[IWeldMelons]

Afaik you can do Vapor Lock on Apple - poor mans VBlank detection: http://deater.net/weave/vmwprod/megademo/vapor_lock.html

[rbanffy]

That’s processor intensive. What’s the minimum number of cycles required to detect a vblank?

[IWeldMelons]

yes it is, but it does not matter if you have finished rendering and now just waiting for the next frame.