Turn your Mac back on, pressing and holding the power button for 10 seconds. To start Macs with Apple Silicon in Safe Mode: It also clears the cache and repairs disks - sometimes solving what’s wrong with Mail altogether. Safe Mode helps to identify whether an issue is being caused by startup software. See if that worked and move on if required. Restart your Mac: go to the Apple Menu on the top left and select Restart. Then reopen the app and see if the issues disappeared. Press Option-Command-Esc to open the force-quit menu. The next couple of tips will require you to follow them in this exact order and test after each step let’s jump right in. Mac Mail keeps crashing once it's been open for a while Thankfully, we've got some quick tips that will help if: Are you here because Apple Mail is not working correctly? If it keeps crashing, stalling, not even loading, or quitting unexpectedly, you've come to the right place