Summary: Sometimes Mac runs very slowly because there is not enough RAM available. By clearing RAM, you can speed up your Mac to some extent. Here are all the tips that can help you to free up RAM on Mac.

Have you ever been irritated by the slow speed of your Mac? In most cases, the reason for your slow Mac is that the RAM has been used to the max. Without enough RAM available, applications may be stuck and you are likely to see errors like "Your system has run out of application memory".

Therefore, you need to clear RAM on your Mac to make it run faster. Here 9 feasible methods will be introduced to help you free up your RAM.

Enough free storage space on Mac is important for the optimal performance of your Mac. Clean your Mac with MacMaster is storage space is low on your Mac.




1. Restart Your Mac

A simple reboot can solve many problems. It can also be the fastest way to free up your RAM. Your Mac will empty the RAM when it restarts, thus it should run smoother and faster. However, if you have some unfinished tasks that have been stuck, you might not want to restart the Mac for fear of data loss. If so, try other solutions below.



2. Close Memory-Hogging Process

The reason that your Mac runs slowly is most likely that RAM is used up, which is possible because you open too many programs at the same time. You can close those unnecessary memory-hogging processes to free up RAM. Here is how to do it.



Step 1 Press Command + Space to open Spotlight.

Step 2 Type Activity Monitor into Spotlight to open Activity Monitor.

Step 3 Click the Memory tab in Activity Monitor.

Step 4 Click the Memory column to sort processes by memory usage.

Step 5 Select suspect processes that are hogging too much memory and click the X to close it.

End Process on Activity Monitor



3. Close Tabs in Browsers

You must be familiar with the situation that sometimes when you visit a website and suddenly your Mac becomes extremely slow. That is because some badly designed web pages you visit may hog a lot of memory with their large unoptimized images, videos, too many ads, or flash content. If this is the case, try closing those website tabs in your browser.

Meanwhile, if you install too many extensions to your browser, they will seriously slow down your Mac, too. So you'd better remove those unwanted extensions. The way to remove extensions differs among different browsers. Take Safari, for example, open Safari > Preferences, click on the extensions tab, choose the extension you want to uninstall, and click Uninstall.



4. Use Sudo Purge Command

A more simple way to clear RAM is to use sudo purge command in Terminal. Just launch Terminal on your Mac, type in sudo purge, press return and then type in your password. After that, your Mac will automatically clear the RAM and disk caches on your Mac.

Clear Cache with Terminal



5. Check CPU Usage

Lack of RAM is not the only reason that will make your Mac slow down. If an application uses too many CPU resources, the running speed of your Mac will be impacted as well. Besides checking your RAM, you can also check CPU usage too quit unwanted processes to speed up your Mac.


Step 1 Launch Activity Monitor with Spotlight.

Step 2 Select the CPU tab.

Step 3 Click the %CPU column to sort processes by CPU usage.

Step 4 Select the processes that are taking up too much CPU resources and click the X to close it.

Chck CPU Usage

In this way, your Mac should run faster.



6. Enough Free Disk Space

Mac will use disk space as virtual memory if you are running out RAM of your Mac. Therefore, you had better keep enough free disk space for backup usage. To do that, you can manually junk files or old apps. Or you can download FonePaw MacMaster to help you with that.

FonePaw MacMaster is designed for MAC memory optimization and disk cleanup. It allows you to select and delete unwanted files safely. Only with several simple clicks, you can get rid of the system junk files, old backups, duplicate photos, old files, unneeded app & app data and make your Mac run faster.


MacMaster Homepage

7. Remove Start-up Items

Start-up items are a list of apps that run automatically each time you turn on your Mac. Some apps even add themselves to start-up items covertly without your permission. If there are too many start-up items on your Mac, they will take up a large amount of memory even though you do not launch them. Therefore you can remove unnecessary start-up items to free up RAM.


Step 1 Open System Preferences.

Step 2 Click User & Groups.

Step 3 Choose your user name on the left sidebar.

Step 4 Choose the Login Items tab.

Step 5 In the list of items, select the app you don't want it to run when your Mac starts up, and then click the (-) button.

Login Items



8. Delete Cache Files

Too many cache files can be another potential factor to slow down your Mac. If your mac still runs slowly after you have tried the above methods, then delete some cache files.


Step 1 Open the Finder and click Go > Go to Folder.

Step 2 Type " ~/Library/Caches/" and click go.

Step 3 In that folder, delete the files you don't need.

Tip: You can clear caches files in one click with MacMaster.



9. Reduce Memory Used by Finder

Finder windows will take up RAM usage as well. You can try closing Finder windows unneeded or merging all the Finder windows together.

In the Finder, click on Window > Merge All Windows.

Merge Finder Windows


Hope that these 9 tips can help you clear RAM and speed up your Mac. If you have any questions, feel free to write down your comment and contact us.