Mac mail show all inboxes

To show all inboxes in Mac Mail, you can follow these steps:

1. Open Mac Mail on your Mac.
2. Click on the "Mail" menu at the top of the screen and select "Preferences".
3. In the Preferences window, click on the "Accounts" tab.
4. Select the account you want to show all inboxes for from the list of accounts on the left side of the window.
5. Click on the "Advanced" tab.
6. Check the box next to "Show all inboxes" at the bottom of the window.
7. Click "OK" to save your changes.

Alternatively, you can also use the keyboard shortcut "Command + Shift + I" to toggle the "Show all inboxes" option on and off.

Note: This option only shows all inboxes for the selected account, not all accounts. If you want to show all inboxes for all accounts, you can use the "Show all inboxes" option in the "View" menu.