After Tahoe 26.2 MacBook not starting when opening screen.

[Dave in Wales]

Since installing Tahoe 26.2 my MB refuses to turn on when I open the screen....it stays black.

To get things started I have to tap the on/off key and then the finger print key.......it's the same key BTW.

I have rebooted a couple of times to no avail.

My wife has a MB Air and hers seems OK after 26.2.

Ho-Hum.

[BDennis]

That’s annoying. I haven’t tried this myself but there’s a documented way of making it behave like this and also a way to reverse it - the later being what you need. An Apple Support article here

https://support.apple.com/en-gb/120622

It involves going down into the dungeon dimensions of the MacOS Terminal command line interface however. I don’t know why they don’t have this in the MacOS system settings.

Update: I just tried this command and it worked to disable and re-enable boot on lid open. If coming out of sleep mode is the issue, then I'm not sure of the solution apart from just trying it anyway. I actually wanted the option not to boot on lid open so I could clean the screen and keyboard!

This is the terminal command that should solve the boot issue and make it boot on lid open:

sudo nvram -d BootPreference

Bill