ivanhorus

Q: iMac black screen booting with external display

Good day to all.

I have iMac 21" 2015 retina with last OS. I have connected external display (Philips HD TV) with HDMI cable.

Second display (TV) is working well until i turn off iMac (i am not using mirror).

When I turn off and try to start again (no matter if TV is on/off) i am getting light black screen on iMac without option to login.

In this situation I have to turn off iMac by force and to switch off HDMI with thunderbolt cable from Mac and to boot again.

When i unable automatic login (without using password) all is working/booting fine but since i am working in office environment it will be good to use password for login.

Can you please help with this subject?

Thanks to all in advance.

iMac, OS X Yosemite (10.10.1)

Posted on Feb 9, 2016 3:53 AM

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