Apple Mail usually takes up a high CPU on my Mac computer after the macOS Catalina update. It happens more and more frequently, it often causes my computer to freeze, which affects my work. Even after updating to the new macOS 10.15.4, it still did not stop, it's time to solve this problem. Fortunately, there are some fairly simple solutions to the Mail high CUP issue. For a period of time after that, CPU usage has been normal.

1. iCloud sync issues

If your Mac turn on Mail for iCloud, Apple Mail needs to sync data to iCloud. When the disk needs to read and write large amounts of data, as well as the upload and download of data through the network, it results in higher CPU utilization. Go to System Preferences -> Apple ID -> iCloud -> Uncheck Mail.

2. Quite com.apple.AddressBookSourceSync Process

Some Apple users have reported that iCloud's process of syncing Gmail contacts may cause this issue. Find the com.apple.AddressBookSourceSync Process in Activity Monitor.app(/Applications/Utilities), then force quit it.

3. Disable automatilly connection setting of Mail account

a). Open the Mail Preferences

b). Go to "Accounts" and select your Provider/Account

c). Click Server Settings (the last right tab)

d). Disable the Automatically manage connection settings (checkbox)

4. Delete Mail logs and cache files

a). Remove the Log folders in /Users/~/Library/Containers/com.apple.mail/Data/Library/Logs

b). Remove the cache folders under /Users/~/Library/Containers/com.apple.mail/Data/Library/Caches

c). Remove the temp folders and cache folders under /private/var/folders, They are not fixed paths, they are variable. We can use PowerSuite -> App Uninstaller feature to find all related files with Apple Mail, then find them in the Finder.

If you find another solution, Let us know your experience with this issue in the comments below.

More Related Articles
	1. How to fix that app can't open on macOS Catalina?? 2. How to fix your macOS system storage is so huge 3. Back up the iPhone without iTunes in macOS Catalina? 4. How to sync all your bookmarks on different browsers on Mac?

About Fireebok Studio

Our article content is to provide solutions to solve the technical issue when we are using iPhone, macOS, WhatsApp and more. If you are interested in the content, you can subscribe to us. And We also develop some high quality applications to provide fully integrated solutions to handle more complex problems. They are free trials and you can access download center to download them at any time.

Popular Articles & Tips You May Like
Five ways to recover lost iPhone data	How to reduce WhatsApp storage on iPhone	How to Clean up Your iOS and Boost Your Device's Performance