Conversation view in Mail broken in High Sierra

Thanks. This helped. The precise path is as follows:

1. System Preferences
2. Displays
3. Switch to the Color Tab
4. Press Calibrate... button
5. Go through the calibration dialgue (I just accepted all defaults)

Tip: Have one of the disappointing black mails open in the background while doing the calibration. As the calibration finishes, the mail message becomes visible again.

matangra wrote:

Would be a problem with the Mac Mini's Intel HD Graphics 3000 drive or High Sierra's?

I think you've correctly identified where the problem lies. Its effects are not limited to Mail.app conversation views (though that's where it's most commonly noticed). Messing with display calibration profiles can be a workaround for some people, but the problem hasn't been properly solved yet. Here's a cross-reference to another discussion in which this issue is being discussed more specifically:

Apple Discussions: Intel HD Graphics 3000 support on High Sierra is broken

I was having this exact same issue with my work computer; a mid-2011 Mac Mini that was upgraded to High Sierra v. 10.13 around October 1st 2017.
I resorted to calling Apple Support, who tried everything they could to fix it, but instead they found the fix on this forum!
So, I can confirm that the colour calibration sequence indeed fixed the black screen issue I, too, was encountering.

My screen is calibrated using X-Rite iDisplay Pro and I have the exact same issue in Mac Mail. Switching to the default color profile fixes it but then the screen is no longer calibrated. Apple needs to fix this bug

I have this problem too.

MacMini Server, 2Ghz Intel i7, 16GB with Intel HD Graphics 3000 512MB running 10.13.1

I fixed it by recalibrating.

Unfortunately, I have to recalibrate several times each day.

I just recalibrated, stepped away from the computer for an hour, and had to recalibrate.

I have the same problem, with my MacMini Server, 2 GHz Intel i7, 8 GB with Intel HD Graphics 3000 512MB running 10.13.2 and using a Color MunkiDisplay made by X-Rite. If I change the Display Profile from the one it just calibrated to an old uncalibrated one the conversation messages show up, then I go back to the right profile and it turns black again. Would be a problem with the Mac Mini's Intel HD Graphics 3000 drive or High Sierra's?

I had the same problem and I fixed it changing the color profile in settings -> monitor.

Try to create a new calibrated profile, it should fix the problem.

Please determine if the same problems occur in "Safe Mode": Use safe mode to isolate issues with your Mac - Apple Support.

See this article if it helps Prepare for changes to kernel extensions in macOS High Sierra - Apple Support

Thank you. Worked fine on my Mac mini 2011. I wish all Mac problems were so quickly solved. This page is not working well for me in Safari 11.0 – I had to go to Firefox to post a reply ;-(

Thank You, this solved for me also...

Fixed, thank you for the assistance!

This works but we are now unable to calibrate monitors using Spyder or similar sensors, without breaking the Mail conversation view. Surely an OSX fix must be on the way.

That worked! Thanks!