garageCube

[sigmasix]

by default when you connect a display to your mac it's setup as mirrored, you have to uncheck mirroring each time you connect a new display

[sigmasix]

ok, you tried everything I could think of… it's strange, I never experienced this…

Did you try different cable/adapter brand? I know DeLock is a real troublemaker, avoid this brand like hell!

[Thelooca]

I've got this working, 2 thunderbolts, each to a monitor (dvi) and the hdmi to a triplehead. Try testing with different projectors aswell, i've also had the issue of not being recognised but if i restarted it was ok. If you hook up everything first and then start your macbook, you should have no problem.

[barneyb]

i know i had a problem with the apple adapters, something to do with active or not. in my case not more the 2 projectors worked. then i switched to active Mini display port to HDMi from Startech and i could use all 6 outputs over thunderbolt (aka mini display port)