Software solutions to fix Kernel Panic on Mac. Update all your software. Find which apps are corrupted. Repair disk permissions. Ensure you have enough free space on drive. Launch Disk Utility. Disable startup items. Turn off peripheral devices. Run Apple Diagnostics. Optimized Image Workflow for the Mac User Rod Wynne-Powell. Have you run any cache cleaning routines? Total system crashes, which are known as kernel panics in Mac OS X, are extremely rare, and well worth taking the opportunity to.
About unexpected restarts
Rarely, your Mac might experience a software or hardware issue that requires it to restart. When it starts up again, you might see a message that your computer was restarted because of a problem.
Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down. Use the steps below to check the software and hardware on your Mac.
Check your software
If the issue is caused by software on your Mac, one of these steps might help:
- Install all available software updates.
- If your Mac suspects that a particular app caused the restart, it might ask whether you would like to move the app to the Trash. Click Move to Trash, then contact the software developer to see if a software update is available.
- Use safe mode to try to isolate the cause of the issue.
- Reinstall macOS. If the issue continues after reinstalling macOS, check your hardware.
Check your hardware
Learn how to check your connected devices and other hardware.
Check peripheral devices first
If you don't have any devices attached to your Mac, skip to the next section.
- Shut down your Mac.
- Disconnect all peripheral devices, such as hard drives or printers. If you have a desktop Mac, make sure that only a display, keyboard, and mouse or trackpad are connected.
- Turn on your Mac.
- Use your Mac for the amount of time that it would usually take for an unexpected restart to occur.
- If an unexpected restart occurs, follow the steps to check the internal RAM and third-party hardware.
- If an unexpected restart doesn't occur, turn off the Mac and connect one peripheral device at a time until an unexpected restart occurs.
Check RAM and third-party hardware
Certain models of Mac computers have removable memory (RAM). If you recently installed memory or a hard disk (or SSD), make sure that it's compatible and installed correctly. If possible, remove it and test with the original memory or disk.
Learn more
- If you continue to experience unexpected restarts, contact Apple Support.
- If your Mac is frequently restarting unexpectedly, it's important to determine the exact steps that lead up to the issue. The next time that your Mac restarts unexpectedly, record the date and time it occurs. These questions might help you diagnose the problem:
- Was the computer starting up, shutting down, or performing a particular task when the unexpected restart happened?
- Is the computer restart random, or does it happen every time you do a certain task?
- Does the restart happen when a specific external device is connected to your Mac or to a specific port?
- Learn what to do if your Mac doesn't turn on or start up.
- Learn about the screens you see when your Mac starts up.
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.
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 your 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:
- Launch CleanMyMac X (2019 version is preferable)
- Select System Junk
- 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:
- Open a Finder window and select “Go to Folder” in the Go menu.
- Type in ~/Library/Caches and hit enter to proceed to this folder.
- Optional step: You can highlight and copy everything to a different folder just in case something goes wrong.
- 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
~/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.
To help you make sense of your Library folder here's a brief explanation what each sub folder stands for.
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.
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:
- Click the 3-dot icon in the top right corner of Google Chrome browser.
- Choose Settings.
- At the bottom of the menu, choose Advanced.
- Click “Clear browsing data.”
- Deselect all, but Cached images and files.
- Timewise, choose All time.
- Hit “Clear data” button.
How to clear cache in Firefox
Here’s how to delete cache in Firefox manually:
- Click the hamburger icon in the top right corner.
- Choose Privacy & Security on the left sidebar.
- Scroll to the section 'Cached web content' menu item.
- Now, click Clear Now to delete Firefox cache.
- 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:
- In the top menu, choose Safari.
- Click Preferences.
- Choose the Advanced tab.
- Enable Show Develop menu in menu bar.
- Now go to Develop in menu bar.
- 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:
- Download CleanMyMac X (free) and launch it.
- Select Smart Scan in the left menu.
- Hit Scan at the bottom of CleanMyMac X.
- Then click Clean.
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:
- Open CleanMyMac and select the Privacy module
- Click on your browser of choice
- Make your selections from the list of all your cache and privacy tracks
- 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.