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Old 09-28-2017, 08:49 PM   #2
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Carlo's Avatar
Join Date: Feb 2009
Posts: 606

Originally Posted by ST17 View Post
I have some issues when I switch to mirroring mode.
- Open display setting and toggle "Mirror Displays" on
- Forced to log out
- Only display link monitor is on, main display is blank
- Log in
- Revert back to dual display mode

Any idea?

MacBook Pro (Retina, 15-inch, Mid 2015) / High Sierra / ASUS MB16AC

This is a known operating system bug in High Sierra. We have investigated it and we don't think there is anything we can do about this issue apart from reporting it to Apple.

To raise the priority of this issue with Apple we suggest to open a bug with them on If you don't have a developer account, then the normal support page offers other options:

You may want to refer to our own bug on the topic (ID 33650324) and/or Apple's internal one (ID 26394372).

Best regards,
Carlo is offline   Reply With Quote