When your Mac need care. Full disk space. You took all those great vacation pictures, but what if you can’t actually save them somewhere safe? Clean junk, duplicates, and useless apps to save gigabytes of disk space for something really special to you. Maximum speed no matter what—that’s what every Mac user expects. The Best Disk Cloning App for Mac OS X. It's definitely a full-on backup utility that can handle things like complex file comparisons, data filters, and pretty much anything you. I had for 1 year an active membership as I was working on projects for iOS and published Disk Info on the app store at the time, but then the membership expired. Just a few days ago I reactivated my membership to release HabitCat, as a side effect Disk Info is back to the store 😁. Disk Full Message. When the Mac startup disk achieves its absolute performance, this means 2 things, precisely speaking 2 consequences: Your Mac’s storage space will get to its limit very soon. The disc will work slowly. Most people do not know, actually, that their Mac is converting a free startup disk space into virtual memory, which you.

• Mac Startup Disk Full Other
• Disk Full On Mac
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• Mac Full Disk App Download

macOS 10.14 Mojave is the “most secure macOS up to date”, if you believe Apple advertising, of course. This macOS update introduces unprecedented restrictions on third-party apps that operate on your Mac. Long gone are times when an app could easily access your content, Mail, address books, and browser history. With global data leakages happening on a daily basis, no wonder that in 2018 Apple placed a kind of “an Iron Curtain” that seals up your most important data, namely, Full Disk Access permission.

What is full disk access in macOS Mojave?

Full Disk Access feature is much like a security check at an airport. When you grant “Full Disk Access” to an app it is added to the white-list of applications that are now marked as safe to work with your data. At the same time, all other applications will be greeted with “You Shall Not Pass.” The protected areas that require Full Disk Access permission are your Mail, Messages, Safari, Home, Time Machine.

According to Apple: “So if your app attempts to access any data that is part of one of the protected categories the system will automatically terminate it.” And by “terminate” Apple really means a forced crash.

What does Full Disk Access mean to you

If you haven’t upgraded to Mojave yet, you don’t have to worry. If you’re running Mojave, using some apps may get troublesome in case they haven’t been yet optimized for 10.14. So, just in case, be prepared for a number of app crashes on your Mac. What else you might expect is that many apps will start bombarding you with prompts to grant them the so-desirable “Full Disk Access.” Should you grant such access? We’ll try to answer that further below.

When should you grant Full disk access for an application?

First, if an app comes from a credible developer and you want it to properly do its job. Obviously, a daily scheduler or some other app from “Productivity” category would absolutely need access to your Calendar in order to simply function. On the other hand, if some Chess application is asking to access your Mail you should be concerned about its real intentions.

Normally, credible apps would politely explain why they want to access your disk and specify the limits for their activity. For example, apps from utilities category, like disk cleaners or disk backup software, are designed to analyze your disk contents to do their job properly, so giving them “Full Disk Access” makes sense. But even if you don’t, these apps will still retain much of their functionality, though be limited in certain actions. To sum it up, providing “Full Disk Access” is perfectly normal if you follow these 2 main conditions:

1. An app comes from a trusted source
2. The explanation for FDA is reasonable

If you doubt about the app’s declared intentions, you can contact the developers of the app — usually their response will be quick and to the point.

How to give Full Disk Access?

Full Disk Access is administered via System Preferences > Security & Privacy. Starting from macOS 10.14 Mojave it contains a special Full Disk Access section that like a folder. Easily enough, you can drag & drop your apps onto a pane right from the Applications folder. But prior to that, you should “unlock” this dialogue window.

How to see Full Disk Access utility:

1. Click on Apple icon > System Preferences..
   
2. Go to Security & Privacy
   
3. Click on a Privacy Tab
   
4. Click Full Disk Access section in the sidebar

Now click the “lock” icon and enter your system password to unlock the panel settings. Well done! Now you can drag & drop apps directly from your Applications so they have a Full Disk Access. You can also do it in bulk by adding many apps at once. Alternatively, you might click the “+” sign to add apps one by one.
Note: For more security of your accounts, you can click “Advanced…” in the same window and tick the checkbox that reads “Require an administrative password…”. This will prevent other users of your Mac from accessing the most important system parts and thus minimize the potential damage from such actions.

What is Full Permissions and how to give them?

How is Full Disk Access different from standard permissions requests on macOS? Permissions are granted for individual actions, like accessing your Photos, whereas Full Disk Access gives unrestricted rights to do multiple operations on your Mac. System permissions come in 3 types.

Permission-protected areas are: contacts, microphone, webcam, Mail, remote desktop control, and calendars. Whenever an app wants to have access to your a, b, c.. it will initiate a standard dialogue box (you’ve seen it million times) where you can click either “Ok” or “Don’t Allow”. In the second case, an app will crash if it attempts to access the restricted areas on your Mac. Once again, you should be ready for a flood of permission prompts when you upgrade to macOS 10.14 Mojave.
The new reality is that permissions is no longer a mere formality when dealing with apps on your computer. You should rather view permissions as a tool, which means you can grant and revoke permissions when necessary. For example, if an app is bothering you with notifications, you can easily take away it’s privileges in System Preferences/Privacy/. Starting from macOS Mojave this particular panel will become an often-visited place on your Mac.

Broken permissions?

The problem comes when some user permissions get lost or broken. One morning you may find that you no longer can open a file or access a certain folder on your Mac. Luckily, there is an easy way to fix it.

I usually fix disk permissions with a tool called CleanMyMac X which has a pretty strong reputation within Mac community.

To fix broken disk permissions:

1. Download CleanMyMac from developer’s site (free download)
   
2. Click Maintenance tab
   
3. Check Repair disk permissions
   

If you perform the rest of maintenance tasks from the described section you may even see your Mac running faster and smoother.

Privacy Permissions not working on Mojave (Camera and Mic)

An often reported issue on macOS Mojave is camera and microphone permissions not working properly. While Apple’s own apps handle camera and mic perfectly well, many third-party apps (like Skype) end up becoming totally unusable due to missing permissions or “Full Disk Access denied”. In such cases, a dialogue box that requests permission is never displayed, for whatever reason. And if a program hasn’t requested a permission — you guessed right — there is no way to make it work. What can you do?

1. Reinstall the app in question
2. Add the app to Full Disk Access folder (see above)
3. If nothing else helps, you may want to downgrade to macOS High Sierra

macOS Mojave privacy changes (and challenges)

Apple’s decision to harden security requirements on macOS Mojave is a long expected move. In the short term we’ll see a swarm of software conflicts linked with macOS permissions. As I mentioned earlier, many users have already reported their audio apps crashing while attempting to enable the microphone access. The same refers to apps that require using camera on your Mac. Still, in the long run, the stronger grip on security will is beneficial for all of us. And as to the flaws, they will hopefully be fixed in the next macOS updates.

To save yourself from the misfortune of constantly crashing software it is recommended that you update all your apps to the latest available versions. Good news, it no longer means hours of googling. You can use the tool I described above, CleanMyMac X, that has a quick built-in Updater module.

1. Run CleanMyMac X (Download a free version here)
   
2. Click Updater
   
3. Mark apps you want to update

This will reduce the chances of your apps crashing on macOS Mojave.
Under today’s security standards users must explicitly authorize any app i.e “an opt-in” logic will become prevalent. Previously, malicious programs could simulate the supposed consent by using the so-called synthetic clicks — a term from a hacker universe. Now such practice becomes more and more difficult but it doesn’t mean “data leaks” will disappear anytime soon.
The described pre-authorization logic is nothing new for iOS users and has gradually become an industry standard. But who would complain about having stronger security on their Mac? Eventually, we’ll get there even if it means making a few redundant clicks everyday.

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A full startup disk is something that every Mac user will experience. This problem used to be known as “Startup disk full” notification. However, on newer macOS versions this message has been changed to “Your disk is almost full.”

But luckily, it’s a problem that has many solutions. And in this article, we’ll go over:

• What is startup disk full?
• What's causing 'Your disk is almost full' alert?
• How to fix startup disk full?
• How to prevent 'Your disk is almost full' problem?

However, we also understand that some people are short on time and just want to fix startup disk full. So, if you’re not really interested in what it is and why it happens, just skip the next two sections and head to “How to Clean Your Startup Disk”.

Or, even better, if you’re looking how to clear space on Mac, we’d highly recommend a utility called CleanMyMac X. It'll help you clean up gigabytes of disk space in just minutes (you can download it here).

Note: if you’re running macOS Sierra (or higher), it has a built-in option of Optimized Storage that is supposed to solve the problem of the full hard drive by moving files into the cloud.

By clicking 'Manage' you can open the menu and see what Optimized storage offers. However, it moves junk and useless files to the cloud together with your files, and eventually, you end up paying for iCloud storage to store junk. So we still recommend getting CleanMyMac and actually dealing with extra files rather than simply moving them.

Now, with all that said, let’s get into what exactly “Your disk is almost full” means.

Understanding What “Your Disk is Almost Full” Means

What is a startup disk?

A startup disk, as taken from Apple Support article, is a volume or partition of a drive that contains a usable operating system. Still confused? Let’s break it down for you.

Your Mac hard drive consists of disks (or partitions). Each disk (or partition) has your Mac data on it, which consists of your operating system, applications, etc. Most Mac users have just one disk but power users may have two or more.

Let’s look at an example of a Mac with only one hard disk:

• Your Mac's hard drive is 500GB.
• It has one 'disk' on it, so all 500GB of storage is on that disk.
• The disk has an operating system (OS X El Capitan), and user data (apps, etc).
• And since you only have one disk, this is your startup disk: all 500GB.

A Mac with two disks will have the storage divided between them. The Mac drive with the OS on it is the startup disk while the other drive is just used for storage of files. It’s possible to have multiple startup disks, but most Macs will only have one.

Why your disk is almost full?

This is easy. It’s a lot like why is your fridge full? There is no more space! Your disk is almost full and this is very bad news for any drive. A hard disk should never get beyond 85% capacity (especially a startup disk) as you will experience slowness and errors the further you get above that mark.

If your startup disk is full and you get a message of warning from your Mac, this is a serious indication that you need to clear up storage immediately.

What to do when your disk is almost full?

So how do you fix your almost full startup disk? The same way you solve the problem of a packed fridge - you need to clear up storage, of course. To make more space on your startup disk you will need to:

1. Delete files from your Mac.
2. Move files to an external hard drive or cloud storage.
3. Or install a second internal hard drive on your Mac.

So, now that we know what a startup disk is, we need to talk about how to fix it. Let’s take a closer look at your disk space to see exactly what is causing your disk to be almost full.

What’s Causing 'Your Disk Is Almost Full' Alert?

Short version: Take a look under-the-hood of your Mac.

Before we can see what is taking up space on your startup disk, first we have to find it:

1. Hover on the Dock at the bottom of your screen and open Finder.
2. Click on “Finder” in the menu bar at the top of your screen.
3. Then select “Preferences…”
4. In the window that opens, checkmark the “Hard disks” checkbox.

After selecting this box, your desktop should now show the hard disks on your mac, in the form of icon(s), like this:

These are disks on your Mac that you can “startup”, this is because they have operating systems on them. If there is more than one of these hard disk icons that show up on your desktop, it means you’ve got multiple hard disks on your Mac. If you only have one, skip the down to “What is taking up all of my startup disk space?” section.

If you have more than one, continue with the next step:

Click on the Apple icon at the top left of your screen System Preferences > Startup Disk.
Here, again, you’ll find your hard disk(s); they’re probably named something like MainSSD or MainHD. It will also display “OS” and the version number of that OS. If you have more than one OS drive, your startup disk should be the one with the latest version of macOS running on it, but we’re going to make sure of that in the next step.

I only have one and it looks like this:

To make 100% sure that you know what drive is your startup disk, follow these steps:

1. Click on the Apple Icon in the menu at the top-left of your screen.
2. Select “About This Mac.”
3. Under macOS, you’ll find a version number. Mine is 10.15.1, like so:

See how my version number in the “About This Mac” window matches the number in my Startup Disk section? Yep — That’s my startup disk. Found yours? Good.

What is taking up all of my startup disk space?

Now that we’ve identified our startup disk, let’s take a closer look at how to clear up space on Mac:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose “About This Mac.”
3. Click Storage.
   Note: If you are running an older version of OS X you may have to first click “More Info…” and then “Storage”.

Take a look at my hard drive disk:

I’ve got 500GB of storage, and about 275GB of it is free.

So, how big is your hard disk? How much free space do you have (if any — *gulp*)? And what’s taking up the most space? It is important to consider drive capacity and data storage needs for future storage plans — we’re not just here to fix the problem, for now, we’re going to make sure you never have this problem in the future as well.

Now that we have the knowledge, it’s time to take action and fix your Mac’s “Startup Disk Full” problem.

Let’s go over 11 things you can do to help fix 'your disk is almost full.' These should also give you other ideas as to how else to fix it — You know your Mac better than we do!

1. Clear system storage on Mac

System storage cleanup sounds like a serious undertaking. But, technically, it boils down to just one thing: having the courage to scrap the old files.

1. Search for large ZIP/RAR archives in Downloads
2. Open your Desktop (Command + F3) and delete screenshots
3. In Applications, sort your apps by size. Delete the largest ones
4. Get rid of system junk files with a free version of CleanMyMac X
5. Restart your Mac to free up RAM.

2. Clean up cache files on your Mac

Cache files are files that help your Mac run programs a bit more smoothly. Think of them like blueprints for a house: your Mac has the blueprints for how a program is supposed to load/run/look, so it loads it faster; without them, it’d be like building it from scratch. However, over time, these caches can start to take up some serious space. Periodically, removing them can help clear storage. And don’t worry, your Mac will create fresh, new ones after you restart your Mac. To remove caches:

1. Open a Finder window and select Go in the menu bar.
2. Click on “Go to Folder…”
3. Type in ~/Library/Caches
   Delete the files/folders that are taking up the most space.
4. Now click on “Go to Folder…”
5. Type in /Library/Caches (simply lose the ~ symbol)
   And, again, delete the folders that take up the most space.

Deleting cache files is generally safe for your Mac. And once you delete them, the applications and processes you run on your Mac will generate fresh, new ones. But, when deleting, worry more about removing them based on size rather than just removing all of them.

Also, you can check the /System/Library/Caches folder as well, but it might be better not to touch this folder without knowing what the items are. A utility that correctly cleans up these files (and pretty much everything else on this list) is, you guessed it, CleanMyMac X. It cleans up even your system caches with just a few clicks.

Oh, and once you’re done with this list, restart your Mac so it can create these new cache files.

Read more: How to Clear Cache on a Mac?

3. Get rid of localization files

Localization files are also known as “language packs.” Lots of apps come with other languages that you probably don’t need. To clear up space on your Mac, delete the ones you don’t need:

1. Open a Finder window.
2. Go to Applications.
3. Ctrl+click on an application.
4. Select “Show Package Contents.”

From here, go to Contents > Resources and look for files ending in .lproj. These are the languages your app has just in case you want to use it in another language, like Spanish (es.lproj). Drag the ones you’ll never use to the Trash.

Again, a safer alternative to this would be to use CleanMyMac X. It gets rid of all of them with a click. No digging through application folders, just a cleaner Mac.

Read more: How to Delete Language Files from macOS?

4. Delete duplicate files

Even if you have the most organized Mac on a planet, duplicates happen one way or another. It can be a file you’ve mistakenly downloaded twice or a mail attachment you’ve opened several times. Regardless of how they appeared, those files sit on your Mac and gobble up storage.

But finding and deleting them is a time-consuming process if you do it one by one. So here’s what you can do to save up time:

1. Open the Finder app on your Mac
2. Move cursor over File and click New Smart Folder
3. Click the “+” button in the upper right corner and choose the type of files you want to see
4. Now sort them by name to quickly spot duplicates.

Remember to pay attention to the date of creation to make sure you keep the true original, not the copy.

While this is the best way to remove duplicates manually, it takes lots of your time and dedication. It’d be much easier to leave this to Gemini 2: The Duplicate Finder.

This app quickly scans your Mac for duplicate and similar files and allows you to delete them within minutes. It keeps your originals safe and helps you easily retrieve files deleted by accident.

5. Remove old iOS backups

Backups can tend to take up a lot of space. You can find and remove them by:

1. Launching a Finder window.
2. Clicking “Go” in the menu bar.
3. Selecting “Go to Folder…”
4. Then, type in ~/Library/Application Support/MobileSync/Backup/

Get rid of all the old, outdated backups your Mac has been storing for a bit more extra space.

6. Remove iOS software updates

You can find all the unnecessary data for your devices by:

1. Opening Finder.
2. Selecting “Go” in the menu bar.
3. Clicking on “Go to Folder…”
4. And entering for iPad ~/Library/iTunes/iPad Software Updates
   or entering for iPhone ~/Library/iTunes/iPhone Software Updates

Delete downloaded files for any of the devices that you are not using anymore, or ones which software just already updated. Remember that after any of your devices have been updated, you don’t need those files.

Read more: How to Delete iOS Software Updates from Mac?

7. Remove unnecessary applications

This isn’t often overlooked, but definitely under-appreciated. Removing old, unused applications is a great way to get some extra space on your startup disk. Go through your applications folder and get rid of all the apps you rarely use. But make sure you remove them correctly, don’t just drag them to the Trash. If you do, you’ll leave behind tons of leftover parts and pieces, and we’re trying to get back startup disk space — It’ll kinda defeat the purpose, no?

This is another place we’d suggest using CleanMyMac X. To completely remove any application, just launch CleanMyMac X, click Uninstaller, select your application, and then click Uninstall. You won’t have to search all over for development junk that’s left behind when Trash’ing an application. It’s incredibly easy and saves you tons of time.

8. Clean up your photo library

Photos, photos, photos. Talk about tons of space! First and foremost, select only what you can get rid of, like image copies and maybe some photos that were mistakenly taken. You know, ones of the ground or something?

Ok, once your own files are taken care of, it’s time to get rid of the files your system created. In Photos for Mac, it’s cache files. In iPhoto, it’s service copies. Both are a pain to find, but here’s how you can get rid of them.

Mac Startup Disk Full Other

Photos cache includes iCloud local copies (created when you view pics from your iCloud photo library on a Mac), Faces cache (generated when you use Faces), and other app-related caches. You’d be surprised how much all that takes up if you regularly use Photos. For OS versions prior to macOS Sierra, here’s the path to locate the cache:

1. Open Finder and navigate to your Photos library (normally, it’s in the Pictures folder).
2. Ctrl+click your Photos library, and select “Show Package Contents.”
3. Open resources, and then modelresource.

You should now see a lot more folders in your Finder window. Photos cache sits in these folders, but the tricky thing is that it’s really hard to say what is safe to remove and what isn’t. Deleting the wrong file can compromise the performance of Photos, which is why we highly suggest you use CleanMyMac X to clear the cache and system junk. It only removes files that are safe to delete, never a critical file or important image.

You can download CleanMyMac X for free and see how it works, it’s so much safer than cleaning up system junk manually.

9. Clean up your Downloads, Movies, and Music folders

Have a closer look at these three folders. You’d be surprised at how many downloads can accumulate when you aren’t paying attention. Clean out anything you don’t need (or don’t know) and organize the rest. It’ll take a load off your mind to know that there’s nothing excess there.

The Movies folder can be a pain, not because you’re searching through tons of files, but it can be difficult to choose what to delete. Personally, I never want to get rid of Top Gun. It’s amazing. I watched it 3 times in a row last weekend. But alas, sometimes you need to make sacrifices for the health of your Mac. Though, what you can do with movies you want to keep is to archive them. So, archive what you wish to keep and remove the rest.

How to archive/compress a file

Archiving a file doesn’t mean to store deeper into the abyss of your Mac — but to turn the file into something smaller, into a compressed file (like .zip or .tar). By archiving a file, you shave off some memory. Archiving is essential for things you want to keep on your Mac, but don’t often use, and helps you clear up some space. And that’s what this is all about right? We’re essentially doing the hokey-pokey on your Mac. To archive a file, just:

1. Ctrl+click the file you want to compress (recommended for movie files).
2. Select, “Compress .”

The last place to sweep through is the Music folder. Find and remove duplicate music files first, and then clean up all the songs you downloaded on a weird Sunday afternoon cleaning the house.

10. Clean your Desktop

“Clean my desktop… but why?” Because some people’s desktops are hard to look at, that’s why. Organize your desktop and get rid of the stuff you just don’t need on there. It looks better and helps your Mac act a bit faster (I don’t know the rocket science behind this one, but it feels too good to be false). Your Mac doesn’t waste time loading all those icons and junk, just… Just clean it, please.

Disk Full On Mac

11. Empty out the Trash (No, we’re not joking…)

Seriously: It may sound incredibly basic, but it could clear a surprising amount of storage. I forget to do it all the time. The thing is, that when you delete something, your Mac doesn’t remove it — it just moves it to the Trash. Plus, you’ve probably deleted way more than you realize, and all that could be sitting in the Trash, wasting space. So get rid of all that junk by emptying the Trash:

1. Ctrl+click your Trash in the Dock.
2. Select “Empty Trash.”
3. And click “Empty Trash.”

And, the easiest step is done.

A few more tips to clear storage on Mac

1. Manage your Optimized Storage

This option comes with your operating system starting macOS Sierra. Go to the Apple menu > About this Mac > Storage

Now, click on Manage to reveal the space-saving options:

2. Erase your Junk Mail

Mac Full Disk App Installer

/how-to-print-photo-mac-photo-app.html. Open your Mail app, and click Mailbox in the upper menu. Here you can erase spam and already deleted items.

3. Delete system junk with CleanMyMac X
Again, this is an incredible utility when it comes to cleaning your startup disk. And this app is notarized by Apple, meaning it's safe.

To avoid the annoying “your disk is almost full” error, download the free edition of CleanMyMac X.
Once you've installed the app, click on the System Junk tab. It will clean up caches, logs, language packs, binaries, duplicate photos, outdated backups, Trashes, and more.

Full Startup Disk Prevention

We’ve cleaned up a few things on your Mac, and hopefully, it’s given you more ideas as to what else you can clean. But, let’s take a look at how much space you saved from cleaning the list above. Remember how we checked your Mac’s free space? Open that window again and see how much space you’ve cleared up:

1. Click the Apple Icon in the menu at the top-left corner of your screen.
2. Choose “About This Mac.”
3. Click Storage.
   Note - If you are running an older version of OS X you may have to first click “More Info…” and then “Storage”.

You’ve probably got a bit more space, and you’ll want to keep it that way. The only way to prevent a “your disk is almost full” is by keeping your Mac clean. We’d recommend a complete cleaning every 2–3 weeks.

Say goodbye to the 'Your startup disk is almost full” message.

Mac Full Disk App Download

So, we’ve now covered everything that we wanted to share with you. Hopefully, this has helped you fix that full startup disk problem. Your startup disk should now be quite a bit lighter (we hope). Oh, and if you liked this article, get social with it to help others in need. And if you really liked this article, subscribe to our email list — we’ve got more guides on the way. And we’ve also got a utility that’ll help you out a ton in the long run: CleanMyMac X. It helps you clean your entire Mac with just the click of a button. It’s incredibly easy to use and works like a charm.

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