Orijinal gönderinin sahibi: QEII Student IT ,
It's odd that it was working but then it stopped. [image|23658] As you should be able to see here, Apple recommend 4GB but 6GB is possible. This means you're not going to get any support from Apple themselves. I would suggest checking the RAM is in the ports correctly, checking About this Mac to see if it still recognises it's there. Try running an Apple Hardware Test, specifically an Extended Test.