I'm trying to use the refactoring rename shortcut on IntelliJ (Shift + F6). However, it doesn't work. I'm using macOS and a Keychron K8 keyboard. I noticed that F5 is not recognized either.
I just found the solution: pressing fn + K + C for 3s, the Keychron keyboard flashes 3 times, then the function of keys f5 and f6 will switch to the normal function on macOS.
Source: Keychron news