Andreas Gysin wrote:
I just want to clean the keyboard with the computer safely turned off… (and no, I don't think that using an app that disables keyboard input is good alternative).
This has to be one of the worst design decisions ever. Also: what’s the purpose of the power key if all keys are power keys?
No, this is considered a feature, with no user preference.
The power key is also a force quit key if necessary...
Log out, sleep, wake, restart, or shut down your Mac - Apple ...
The way I do—when you are fully booted into your account, use the key shortcut: Control, Command Q
this will effectively lock your screen, and any input is is incidental until you enter your correct psswd to log-in.
You can submit your feedback and request using this link— Apple Feedback http://www.apple.com/feedback
How to clean your Apple products - Apple Support
Clean your Mac computer's screen or display - Apple Support
How to clean the keyboard of your MacBook or MacBook Pro ...