MacBook 12" early 2015 does not use internal screen after boot

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MacBook 12" early 2015 does not use internal screen after boot

Dear everyone, I got a strange situation with my MacBook after a high Sierra update it would not boot beyond the 100% bar.

However I was able to access it via vnc and ssh. In the vnc session it identifies the screen as an 23" internal screen. The screen stays on the 100% bootbar.

I was able to install Catalina via vnc session, but that did not fix the issue. Any idea how I could flash the firmware again (was part of the high Sierra update)

I am not able to install from a bootstick (catlina installer).

Best regards

Joerg

MacBook

Posted on Jun 5, 2020 6:58 PM

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Answer 1

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MrHoffman

Community+ 2025

Level 10

145,259 points

Jun 6, 2020 9:40 AM in response to joerg_m

Try a Safe Mode boot. That disables various add-ons, and rebuilds caches.

I’d first remove Avira and DuetDisplay per vendor instructions, and reboot.

Add-on anti-malware has caused weird problems, and a display-related package may well be causing display-related issues.

Failing that, I’d then remove Tunnelblick, and ZeroTier, as those can alter with IP routing.

Independent of the rest here, I’d remove or update MacFUSE and NTFS.

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Answer 2

Jun 5, 2020 7:05 PM in response to joerg_m

Tried the SMC and NVRAM reset?

Any add-on anti-malware, add-on anti-virus, add-on VPN clients, or,add-on cleaner apps?

Download and run and post the output of EtreCheck here. Open a new reply here and then press the button that looks like a printed page to get a text input box big enough to paste the hardware and software configuration report here.

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Answer 3

joerg_m Author

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8 points

Jun 7, 2020 4:51 PM in response to MrHoffman

Not even a MacOS Catalina bootstick would work to install MacOS, i installed Ubuntu now, it's working all find under ubunutu, i probably wait until this gets fixed by the next update and try again to install MacOS, but i need tha machine to work in the meanwhile.

Thank you

Joerg

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Answer 4

joerg_m Author

Level 1

8 points

Jun 6, 2020 2:31 AM in response to MrHoffman

SMC and NVRAM are reset, will download the EtreCheck once my install attempt fails again, the thing is even present when i boot with a Catalina OS install usb key...

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Answer 5

joerg_m Author

Level 1

8 points

Jun 6, 2020 8:53 AM in response to MrHoffman

etrecheck

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MacBook 12" early 2015 does not use internal screen after boot

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