一条mac用户一定会喜欢的AutoHotKey规则：

SetStoreCapslockMode, off
Capslock::
	KeyWait, CapsLock
	If (A_TimeSinceThisHotkey > 300)
		SetTimer, mainp, -1
	Else
		Send #{Space}
Return

mainp:
	If GetKeyState("CapsLock", "T") = 1
		SetCapsLockState, AlwaysOff
	Else
		SetCapsLockState, AlwaysOn
Return