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On your Mac, click the Apple menu-> Shut Down. To leave Safe Mode, restart your Mac through the Apple menu-> Restart. Note: If it doesn’t work out, leave Safe Mode and then try the next solution. You may need to log in twice if FileVault is turned on. Select your User Account and then Enter the password to log in.Keep holding the finger on the Shift Key until you see the Login Window.Don’t leave the Shift key when you see the Apple Logo. Now you can see the Apple Logo appears on the screen.Press and hold the Shift Key immediately after pressing the Power Button.Press the Power Button to turn on your Mac.But you can’t use some features in Safe Mode. Restarting your Mac in Safe Mode will fix many issues in the Mac. Solution 5: Restart your Mac in Safe Mode Then enable the Mail and the open Mail app.Select the mail account and then disable (Turn off) Mail.Go to System Preferences-> Internet Accounts.Sometimes refreshing the mail apps will fix this problem. Now check your mail account is working successfully or not.Find all mail-related plist files and move them to trash.
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Enter ~/Library/Preferences and then click the Go option.If your mail app s not working properly, then delete the mail plist files on the mac and restart your device. Again press the Power Button to turn it on.Then wait for a few seconds, then it will show an Apple logo on the screen.
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Solution 8: Reinstall macOS Mojave (Recovery Partition).Solution 7: Disk Errors in Recovery Mode.Solution 5: Restart your Mac in Safe Mode.
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