If you delete optimised and proxy media files, you'll have to regenerate them manually when you reopen the library. To see how much space generated files take up, select the library in the Libraries sidebar, then scroll to Cache in the Library Properties window. Choose File Delete Generated Library Files. Feb 14, 2013  How to clear your cache on a Mac - There are a couple of cache folders you need to clear on a mac. See how to do it and delete your trash securely. /Library/Caches Claude Pelanne. Oct 23, 2017  But with time these files keep on increasing and slow down your Mac. Remove them carefully otherwise some important files may get removed. To delete your system cache follow the same steps as that of cleaning user cache by going to /Library/Caches and move to a particular app and delete their inside files which you think are not quite useful.

Optimized Storage in macOS Sierra and later* can save space by storing your content in iCloud and making it available on demand. When storage space is needed, files, photos, movies, email attachments, and other files that you seldom use are stored in iCloud automatically. Each file stays right where you last saved it, and downloads when you open it. Files that you’ve used recently remain on your Mac, along with optimized versions of your photos.

* If you haven't yet upgraded to macOS Sierra or later, learn about other ways to free up storage space.

How To Delete Library Caches Mac

Find out how much storage is available on your Mac

Choose Apple menu  > About This Mac, then click Storage. This is an overview of available storage space on your Mac, as well as the space used by different categories of files:

Click the Manage button to open the Storage Management window, pictured below. (The Manage button is available only in macOS Sierra or later.)

Manage storage on your Mac

The Storage Management window offers recommendations for optimizing your storage. If some recommendations are already turned on, you will see fewer recommendations.

Store in iCloud

Click the Store in iCloud button, then choose from these options:

• Desktop and Documents. Store all files from these two locations in iCloud Drive. When storage space is needed, only the files you recently opened are kept on your Mac, so that you can easily work offline. Files stored only in iCloud show a download icon , which you can double-click to download the original file. Learn more about this feature.
  
• Photos. Store all original, full-resolution photos and videos in iCloud Photos. When storage space is needed, only space-saving (optimized) versions of photos are kept on your Mac. To download the original photo or video, just open it.
  
• Messages. Store all messages and attachments in iCloud. When storage space is needed, only the messages and attachments you recently opened are kept on your Mac. Learn more about Messages in iCloud.

Storing files in iCloud uses the storage space in your iCloud storage plan. If you reach or exceed your iCloud storage limit, you can either buy more iCloud storage or make more iCloud storage available. iCloud storage starts at 50GB for $0.99 (USD) a month, and you can purchase additional storage directly from your Apple device. Learn more about prices in your region.

Optimize Storage

Click the Optimize button, then choose from these options.

• Automatically remove watched movies and TV shows. When storage space is needed, movies or TV shows that you purchased from the iTunes Store and already watched are removed from your Mac. Click the download icon next to a movie or TV show to download it again.
  
• Download only recent attachments. Mail automatically downloads only the attachments that you recently received. You can manually download any attachments at any time by opening the email or attachment, or saving the attachment to your Mac.
  
• Don't automatically download attachments. Mail downloads an attachment only when you open the email or attachment, or save the attachment to your Mac.

Optimizing storage for movies, TV shows, and email attachments doesn't require iCloud storage space.

Empty Trash Automatically

Empty Trash Automatically permanently deletes files that have been in the Trash for more than 30 days.

Reduce Clutter

Reduce Clutter helps you to identify large files and files you might no longer need. Click the Review Files button, then choose any of the file categories in the sidebar, such as Applications, Documents, Music Creation, or Trash.

You can delete the files in some categories directly from this window. Other categories show the total storage space used by the files in each app. You can then open the app and decide whether to delete files from within it.

Learn how to redownload apps, music, movies, TV shows, and books.

Where to find the settings for each feature

The button for each recommendation in the Storage Management window affects one or more settings in other apps. You can also control those settings directly within each app.

• If you're using macOS Catalina, choose Apple menu  > System Preferences, click Apple ID, then select iCloud in the sidebar: Store in iCloud turns on the Optimize Mac Storage setting on the right. Then click Options next to iCloud Drive: Store in iCloud turns on the Desktop & Documents Folders setting. To turn off iCloud Drive entirely, deselect iCloud Drive.
  In macOS Mojave or earlier, choose Apple menu > System Preferences, click iCloud, then click Options next to iCloud Drive. Store in iCloud turns on the Desktop & Documents Folders and Optimize Mac Storage settings.
• In Photos, choose Photos > Preferences, then click iCloud. Store in iCloud selects iCloud Photos and Optimize Mac Storage.
• In Messages, choose Messages > Preferences, then click iMessage. Store in iCloud selects Enable Messages in iCloud.

• If you're using macOS Catalina, open the Apple TV app, choose TV > Preferences from the menu bar, then click Files. Optimize Storage selects “Automatically delete watched movies and TV shows.”
  In macOS Mojave or earlier, open iTunes, choose iTunes > Preferences from the menu bar, then click Advanced. Optimize Storage selects “Automatically delete watched movies and TV shows.”
• In Mail, choose Mail > Preferences from the menu bar, then click Accounts. In the Account Information section on the right, Optimize Storage sets the Download Attachments menu to either Recent or None.

Empty Trash Automatically: From the Finder, choose Finder > Preferences, then click Advanced. Empty Trash Automatically selects “Remove items from the Trash after 30 days.”

Other ways that macOS helps automatically save space

With macOS Sierra or later, your Mac automatically takes these additional steps to save storage space:

• Detects duplicate downloads in Safari, keeping only the most recent version of the download
• Reminds you to delete used app installers
• Removes old fonts, languages, and dictionaries that aren't being used
• Clears caches, logs, and other unnecessary data when storage space is needed

How to free up storage space manually

Even without using the Optimized Storage features of Sierra or later, you can take other steps to make more storage space available:

• Music, movies, and other media can use a lot of storage space. Learn how to delete music, movies, and TV shows from your device.
• Delete other files that you no longer need by moving them to the Trash, then emptying the Trash. The Downloads folder is good place to look for files that you might no longer need.
• Move files to an external storage device.
• Compress files.
• Delete unneeded email: In the Mail app, choose Mailbox > Erase Junk Mail. If you no longer need the email in your Trash mailbox, choose Mailbox > Erase Deleted Items.

Learn more

• When you duplicate a file on an APFS-formatted volume, that file doesn't use additional storage space on the volume. Deleting a duplicate file frees up only the space required by any data you might have added to the duplicate. If you no longer need any copies of the file, you can recover all of the storage space by deleting both the duplicate and the original file.
• If you're using a pro app and Optimize Mac Storage, learn how to make sure that your projects are always on your Mac and able to access their files.

You’ve probably heard and seen the term 'cache' used on your Mac but do you know what it is?

Cache files are basically temporary data stored on your hard drive and used to speed up processes. For instance, Safari will download images on a webpage into cache so that next time you visit the site you don’t have to download the images again.

How are cache files different from cookies?

Cookie files are tiny members of the big cache family. This form of cache is collected by your browser to remember previously visited websites. Cookies collect the details of your visit, its duration, actions on a page, etc. Advertisers also use these to follow you around the internet. However annoying they are, cookies are a part of internet reality that we cannot help but “Accept.”

There are many reasons to remove old cache from your MacBook and disk space issue is only one of them. So what are the other benefits ?

• Fixing issues with laggy web pages that load outdated content
• Removing personal data stored by websites and applications.
• You need to force-delete outdated cache from an app.

Are you ready to reclaim space on your Mac? Let’s go!

What are main cache types?

There are roughly three main types of caches you can clean on your Mac:

• System cache
• User cache (including app cache and DNS cache)
• Browser cache.

This article will go over cleaning up all three.

Now, when it comes to clearing cache on Mac, there are two ways you can do it. You can clean them up manually step-by-step, or you can clean them in second with a cleaning utility like CleanMyMac X. If you want to clear cache on your Mac right now, we suggest doing it the easy way:

1. Launch CleanMyMac X (2019 version is preferable)
2. Select System Junk
3. Click 'Scan', and then “Clean”

That’s it, all cache files cleaned! CleanMyMac X works on all systems, including the latest macOS Catalina. You can download CleanMyMac X for free here and try.

However, if you’d like to clean them all manually, follow the steps below.

How to empty user cache on Mac?

Potential space reclaimed from junk - Up to 70%

As you can see, a single user cache folder on my computer takes up enormous 1.6 GB of space. And that’s just one folder out of hundreds. That means a good cleaning could free up gigabytes of free space and speed up your Mac in the process.

To clear your user cache, do the following:

1. Open a Finder window and select “Go to Folder” in the Go menu.
2. Type in ~/Library/Caches and hit enter to proceed to this folder.
3. Optional step: You can highlight and copy everything to a different folder just in case something goes wrong.
4. Go into each of the folders and clean out everything.
   Note: We recommend that you remove the insides of these folders, but not the folders themselves.

Now, repeat the same steps above, but substitute…
~/Library/Caches with… /Library/Caches

Make sure that once you have finished clearing out these caches for additional hard drive space, you empty out your Trash. To do this, Control-click on the Trash icon in the dock and select “Empty Trash.” Restart your Mac afterward so your Mac can begin to create new, fresh cache files.
To help you make sense of your Library folder here's a brief explanation what each sub folder stands for.

4 main types of cache within Library folder

Caches
Temporary data created by apps and websites. Your apps keep generating cache files for as long as they are active. Relying on such pre-loaded content reduces memory load and speeds up data exchange.
Preferences
Prererences folder is where you’ll find customized settings for your apps. Sometimes, there is a need to reset an app and delete its corrupted Preferences file. Preference files always end with .plist — so they are easy to spot and delete.

App support
App support folder contains large pieces of app data, like game saves. App support files may remain on your Mac long after you’ve deleted the app itself. That’s why “cleaners” for system junk were invented.

Containers
Containers folder is an exchange buffer that apps use to communicate with one another. This is often referred to as “sandboxing.” Containers folder is automatically emptied after you restart your Mac.

If you aren’t comfortable with the risk of deleting user cache manually, a specialist cleaning app CleanMyMac X can do it for you. It will only remove files you don’t need and will find up to 7x more temporary cache files to remove from all over your system.

How to delete system and app cache on Mac

Potential space reclaimed from junk - Up to 10% (manual methods) or 15% (using cleaner)

Next up we’re looking at your system cache files. These hidden cache files are mainly created by the apps that run on your Mac.

What is app cache? In short, it’s any media downloaded by the apps you use in order to work faster and not load it every time you open the app. Do you need it? It’s debatable, but app cache takes up disk space and can be cleaned.

You can delete app cache on Mac in the same way as user cache, by going to ~/Library/Caches and removing the insides of the folders with the app name.

Proceed with caution! Not all app cache can be safely cleared. Some app developers keep important user info on cache folders. Backing up a folder before you delete is always a good idea. If everything works fine then you can delete the backup later.

To be on the safe side, use CleanMyMac, it works with a Safety Database and knows how to clear app cache safely. As if that wasn’t enough it will also remove more junk than manual methods.

How cache is created? An example from Photos

Every time you do image manipulations, like rotating a picture, its additional copy is created on your drive. In this manner, just 4 rotations are enough for an image size to grow from 2.5 MB to 10 MB of disk space taken. If you edit photos and videos on a regular basis, you may notice that your editor application also keeps temporary data — like intermediate version of your files.

How to clear browser cache on Mac

Potential space reclaimed from junk - Up to 15%

We all love to surf the web but every site we visit adds to the growing browser cache. Clearing your browser cache doesn’t just free up space, it will can also clear your browsing history to secure your privacy.

Browser cache temporarily stores website data such as images, scripts, and other stuff, in order to make your browsing faster when you revisit the same site. If you’re worried about your privacy or want to hide pages you’ve visited, you can clear your Internet cache (or browser history). Also, resetting your browser cache will potentially help to get rid of 404, 502, and other errors caused by corrupted cache.

Each browser has its own cache location, so the process of clearing is different in each case. For instance, Chrome cache location is in Settings, Safari stores its cache in Privacy, and Firefox cache location is History tab.

Mac User Cache Files

Here’s a quick introduction into how to delete browser cache on Mac.

How to clear cache in Chrome

Here’s how to clear browser cache in Chrome manually:

1. Click the 3-dot icon in the top right corner of Google Chrome browser.
2. Choose Settings.
3. At the bottom of the menu, choose Advanced.
4. Click “Clear browsing data.”
5. Deselect all, but Cached images and files.
6. Timewise, choose All time.
7. Hit “Clear data” button.

How to clear cache in Firefox

Here’s how to delete cache in Firefox manually:

1. Click the hamburger icon in the top right corner.
2. Choose Privacy & Security on the left sidebar.
3. Scroll to the section 'Cached web content' menu item.
4. Now, click Clear Now to delete Firefox cache.
5. Exit/quit all browser windows and re-open the browser.

In the same menu, checkmark Override automatic cache management and limit the cache size in MB. Go with the default amount of 350 MB, which is enough for most users' needs.

TIP:

If for some reason you cannot open a web page, try putting cache: in front of the URL address. This redirects you to the site’s cached copy.

For example: cache:macpaw.com

It works most of the time and can magically open even the otherwise blocked sites.

How to clear cache in Safari

Safari is a little trickier than the rest of the browsers. You could remove caches together with all the other website history through History — Clear History in menu bar.

But if you need more precision, here’s how to empty cache on Safari browser:

1. In the top menu, choose Safari.
2. Click Preferences.
3. Choose the Advanced tab.
4. Enable Show Develop menu in menu bar.
5. Now go to Develop in menu bar.
6. Choose Empty caches.

Make sure you close/quit the browser and restart it after clearing cache. Note, that all your auto logins and predicted websites in the address bar will be cleared.

Manual methods remove most of the browser junk but if you want to remove all of it, from all your browsers at once, there’s a safer and faster method to clear your internet cache on any browser.

How to clear cache files on Mac with a single click of a button

Instead of searching all over your Mac to find and remove cache files yourself, you can clear user caches on a Mac using CleanMyMac X. It makes removing cache files as easy as can be.

To get rid of cache files with CleanMyMac X:

1. Download CleanMyMac X (free) and launch it.
2. Select Smart Scan in the left menu.
3. Hit Scan at the bottom of CleanMyMac X.
4. Then click Clean.

Delete Library Caches Mac

And you're done! If you’d like to remove only cache files and nothing else, click on Review Details before clicking Clean. Deselect everything but System Cache Files and User Cache Files, then click Clean.

The easy way to clear all browsing data

Instead of clicking between browsers and being limited to what they let you clean, take full control of all your browser cleaning with this simple method:

1. Open CleanMyMac and select the Privacy module
2. Click on your browser of choice
3. Make your selections from the list of all your cache and privacy tracks
4. Click Remove to clean your browser

Cleaning your Mac has never been easier. Download CleanMyMac X and try for free to get yourself a faster, cleaner Mac — without worrying about cleaning the wrong thing.

Caches Library Macbook

Delete Caches Mac

And if you’re looking to clear just browser cookies, check out this easy one-minute explanation we’ve made for you.

What Are Caches On Mac

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