Getting "This message has no content" on some Apple Mail emails

Hi murrayfrombirmingham,

It sounds like you see "This message has no content" on your Mac, but it loads on your iPhone. Is that right?

Does this happen with mail from a specific sender?

Have you tried clicking Apple menu () > Restart to see if this helps?

If the issue continues after a restart, boot into safe mode with these steps: How to use safe mode on your Mac

"How to use safe mode

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

Apple silicon

1. Shut down your Mac.
2. Turn on your Mac and continue to press and hold the power button until you see the startup options window.
3. Select your startup disk, then press and hold the Shift key while clicking “Continue in Safe Mode.”
4. Log in to your Mac. You might be asked to log in again.

Intel processor

1. Turn on or restart your Mac, then immediately press and hold the Shift key as your Mac starts up.
2. Release the key when you see the login window, then log in to your Mac. 
3. You might be asked to log in again. On either the first or second login window, you should see ”Safe Boot” in the upper-right corner of the window."

Once you test in safe mode, click Apple menu () > Restart to get back to normal. Let us know how it goes.

Take care.

Hello murrayfrombirmingham

Thank you for providing those additional details. Let us know what happens after you start up your Mac in safe mode as previously suggested.

Take care.