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appleuserindc

macrumors member
Original poster
May 22, 2015
59
45
I was on vacation when I upgraded my MacBook Pro 14" (2021) to Sonoma, and when I returned home and upgraded the firmware of my Studio Display, I discovered an odd Magic Keyboard-related bug when connecting my MBP in clamshell mode.

When using my Magic Keyboard with Touch ID, the brightness keys won't respond (though all other keys work), and the brightness slider isn't available under system settings. Also, locking or resetting the MBP seems to disable both Touch ID and unlocking with Apple Watch. Connecting the keyboard via cable solves the problem, though that's not really a solution. :)

I have since discovered that connecting via the two USB-C ports other than the one closest to the MagSafe connector seems to solve the problem. But never had this issue before Sonoma or ASD firmware 17, so it seems like a bug.

I can't seem to reset the keyboard -- online instructions say to click on the Bluetooth logo in the menu bar while holding down the option and shift, but I don't get a factory reset button as expected.

Anyone else having this issue?
 

xraydoc

Contributor
Oct 9, 2005
10,864
5,337
192.168.1.1
No issues with the brightness slider. I'm not using a Magic Keyboard so I can't speak to the brightness keys on it, but the display brightness keys on my Keychron keyboard still work.
 

appleuserindc

macrumors member
Original poster
May 22, 2015
59
45
Thank you. Yes, I'm fairly certain this is related to the wireless Magic Keyboard with Touch ID. Not sure if the bug is with Sonoma or the new Studio Display firmware, but it only seems to happen when I plug the Thunderbolt cable in the USB port next to the MagSafe connector.
 

appleuserindc

macrumors member
Original poster
May 22, 2015
59
45
This is (essentially) resolved. First, I reset the ASD, which I should have done in the first place. As everyone knows, Apple should have some way of resetting the ASD without unplugging and plugging back in. Anyway, they did in fact change the behavior of the ASD in clamshell mode with Sonoma and/or the latest ASD firmware update. Before, when you plugged in the Thunderbolt connector to the MacBook, the ASD screen would turn on, and the MacBook would unlock via Apple Watch if you had that security setting turned on. Now, the screen stays off, and you have to wait a few seconds or so before waking the ASD with your keyboard in order for Apple Watch unlock to work. Not a big deal and not a bug.
 
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