Option key not showing startup disk options on M2 Mac Studio

Macs with Apple Silicon chips cannot get to the startup manager that way.

Shut the Mac down. Turn it back on and hold the power key. You will eventually get the startup manager.

I only do that if I want to run in Safe Mode. It's much faster to choose the other bootable volume in System Settings and restart.

Just to add

A Mac Studio M2 is a headless computer and comes without a Keyboard or Mouse

If using a Bluetooth Apple Keyboard

Suggest cabling the keyboard to the computer

Reason, the Bluetooth Kernel may not load fast enough to allow the keyboard to function during this process

Cabled keyboard should work

Er, yes, I already described the only way to get there was by shutting the Mac down. Then turning it back on and holding the power key in.

I was responding to your reply:

Suggest cabling the keyboard to the computer

Reason, the Bluetooth Kernel may not load fast enough to allow the keyboard to function during this process

Cabled keyboard should work

I could only assume after seeing my first response you were implying a cabled keyboard would allow the user to do an Option key startup on an Apple Silicon Mac. This cannot be done.

A cabled keyboard won't make a difference. An Apple Silicon Mac will not pay attention to the old Option key startup.

Mac startup key combinations - Apple Support

With due respect by friend 😎

Once the user reaches this point in the process

• Select a startup disk, such as Macintosh HD, which is the disk your Mac starts up from by default. Then click Continue to start up from that disk.

Does this not imply some type of Keyboard or Mouse to perform this action

Go it. 👍 😀

Hope, I have not caused OP some confusions here