Playstation3-iMac

yes you can

here are some guides

http://www.google.dk/search?source=ig&hl=da&rlz=1G1TSEH_ENDK367&q=using+imac+as+ monitor&oq=using+imac+as&aq=1&aqi=g9&aql=&gs_sm=e&gs_upl=544526l546747l0l549886l 13l12l0l1l1l0l224l1453l1.8.1l10l0

sorry , but thats not really helpful 😕 dont u have a direct link for a guide u know works ?

Which model iMac do you have? Only certain iMac's support the Target Display Mode feature which allows the iMac to act as a display. To further complicate matters, the most recent Thunderbolt enabled iMacs support the Target Display Mode feature, however they only work with other Thunderbolt enabled products.

Here's an article that provides more information about Target Display Mode:

http://support.apple.com/kb/PH4469

If you have the prior generation 27-inch iMac's (known as Late 2009 or Mid 2010 models) then you can purchase a mini-displayport to HDMI adapter to connect your PS3 to the iMac's mini-DisplayPort port. Here's an example of the type of cable/adapter you need. There are probably other options too.

http://www.kanexlive.com/xd

If you have the current generation iMac then I am not aware of any adapters that would work, although it's possible that someone else may know of a solution.

Very nice answer 🙂

My model is 21.5", medio 2011 , (it says so in specifikations) , i bought it late last year , also i bought a mini-display adapter to hdmi , then realized it was a thunderbolt i need .. lol .. np im going back tomorrow to trade it for a thunderbolt to hdmi adapter .. in the link u pasted in your post , it says "both mac computers" in the discription how-to , i guess thats only an example , but it could be device + mac instead of mac + mac ?

Thanks

I am not aware of any HDMI to Thunderbolt adapters that will work with your Thunderbolt capable system. If a solution were available it would come from a company like Kanex http://www.kanexlive.com/ or Gefen http://www.gefen.com/.