Mac OS 10.7.5 – VLC - Can't find AB Loop Hotkey in Preferences
System Prefs > Keyboard > Shortcuts > App Shortcuts.

Hit +  add VLC &amp; set up as a Menu Command 

[if you can't find the → character just copy/paste this… A→B Loop]

Add any hotkey you like - beware of duplicates, of course - the new hotkey will then show in VLC's menu as though it were native.

I don't know how A→B Loop behaves on the PC, but on Mac it's simply one tap to set the 'in' point A, second tap sets the 'out' point B &amp; automatically starts the loop. 3rd tap clears the loop points &amp; playback continues.