The problem: I have a Mac keyboard where the Alt/Win (i.e. Option/Command) keys are inverted compared to a regular PC keyboard, and I'd like to swap them.

The answer:

[codesyntax lang="bash"]

# clear all options
setxkbmap -model "pc105" -layout "us,se" -option ""  

# set the Apple keyboard
setxkbmap -rules "evdev" -model "pc105" -layout "us,se" -option "terminate:ctrl_alt_bksp,lv3:rwin_switch,grp:shifts_toggle,altwin:swap_lalt_lwin"

[/codesyntax]

And another one which I call when I'm back on a normal keyboard:

[codesyntax lang="bash"]

# clear settings
setxkbmap -model "pc105" -layout "us,se" -option ""

# pc keyobard
setxkbmap -rules "evdev" -model "pc105" -layout "us,se" -option "terminate:ctrl_alt_bksp,lv3:rwin_switch,grp:shifts_toggle"

[/codesyntax]