One more time; many thanks to MacSales xavier.licariI would recommend this item to a friend!
My old mac had been a loyal servant for over 8 years, but had poor performance. Took for ever to do anything. I bought a new one - top spec, over $3k. But what to do with the old one. My kids weren't interested as it was sooooo slow. A $112 investment which i thought would be a waste of money was spent on this memory. 3 minutes to swap the memory - (one screw and its done), and no risk to the machine. The performance from 4gb to 6gb....wow. Its almost like new. Almost as quick as the brand new one I bought....wish I hadn't now. The kids love their 'new mac' Don't hesitate. It works Possibly the best thing I have ever bought online.I would recommend this item to a friend!