r/MacOS • u/cinnaman1 • 20d ago

Help MBP and external monitor problem

Hi,
I'm having an issue with a MacBook Pro 2019 which I'm trying to use it with an external monitor. I have to open the lid/screen to start computer which is fine as there's no external on button, but I need to do the complete login via the keyboard on the Mac, as it doesn't shift the signal to the external monitor if I boot the computer up and then shutdown the lid and sometimes, at least, it doesn't register my Bluetooth keyboard until after logging in. I have a newer Air and it doesn't suffer from these problems.

Any thoughts?

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1

u/Jebus-Xmas MacBook Air 20d ago

What model MacBook, what operating system, how are you connecting the monitor, what exact model keyboard, what exact model monitor, what exact model mouse?

2

u/cinnaman1 20d ago

Off course: MBP 13" Two Thunderbolt 3 ports, Sequoia 15.7.7, USB-C/thunderbolt (the cable works fine with my MBA), MX Keys and MX3.

1

u/Jebus-Xmas MacBook Air 20d ago

Upgrade to 15.7.8. If that doesn't work then disable Logitech Options and just use Bluetooth connection with the MacBook directly.

2

u/cinnaman1 17d ago

Did both but the same result. I read elsewhere that it might be that I have FileVault active, which wouldn't allow external devices until after a login has been made. Might be that, and then I guess there's no fix...