I prefer the default behavior of the Function keys on my Mac to act like old school standard function keys (F1, F2, etc.).

So I switch on the according setting in macOS 13: Keyboard / Keyboard Shortcuts... / Function Keys / Use F1, F2, etc. keys as standard function keys.

Since macOS 13.3 or so this setting keeps switching off mysteriously after a while.

So it works for a while after I switch it on, but then, after some time, when I press F12 for example, the volume goes up instead of whatever the F12 shortcut would do in the app I'm using. I check the settings, and the switch is turned off again.

I haven't noticed a particular pattern so far. I usually only reboot for OS upgrades, so I don't think it's caused by reboots.

I guess it's a macOS bug, but then there should be more than just me experiencing this. Anyone else having this problem?

1 Answer 1


I discovered a setting in Porting Kit which I use to play some old Windows games which says "Switch F1-F12 keys function to Fn functions while in game".

That gave me the idea that maybe Porting Kit is reverting my macOS setting and I was actually able to confirm this: Porting Kit is messing with my macOS setting for the Function keys.

  • Can you clarify what the "Porting kit" you are referring to? Is it the game porting toolkit?
    – hym3242
    Commented Jun 2 at 13:37
  • portingkit.com Commented Jun 2 at 15:01

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