- Step 1:Check if your Mac computer is connected to the internet.
- Step 2:On the Mac computer, navigate to the Apple menu and click the System Preferences option.
- Step 3:Open the iCloud window and sign out of your icloud account.
- Step 4:Restart the Mac computer and login back into the iCloud account using the correct Apple ID and password.
- Step 5:In the iCloud dialog window, you will see the following options.
- Step 14:Select the checkbox next to the Mail option. Also, checkmark the box beside the other options that you need to use.
- Step 15:Check if the iCloud mailbox not showing in Mail issue has been resolved.
- Step 16:If not, access the iCloud account from other devices like an iPhone.
- Step 17:If required, force quit the Mail application.
- Step 18:In the Mail application, click the Force Quit option.
- Step 19:If you cannot quit the application normally, quit it from the menu.
- Step 20:Hold the Option, Command, and Esc keys at the same time on the computer’s keyboard.
- Step 21:Alternatively, press and hold the Control, Alt, and Delete keys together.
- Step 22:When the Force Quit Applications dialog window appears on the screen, choose the Mail application and click the Force Quit button.
- Step 23:This will close the Mail application.
- Step 24:Start the application again.
- Step 25:Create a new mailbox by performing the quick instructions given here.
- Step 26:In the Mail application, click the Mailbox option followed by the New Mailbox option.
- Step 27:Choose either the On My Mac or Account option from the Location drop-down menu.
- Step 28:Create a name for the mailbox and select the OK option.
- Step 29:If the iCloud mailbox not showing in Mail app issue persists, click the Call button provided on this web page.
- Step 30:Our technical support member assists you in resolving the issue.