Hello, For the people who don't want to open up their (brand new) iMacs and spend too much $$$ on the Apple built-to-order SSD, there is an alternative solution. All iMacs have a Firewire 800 connection and although it isn't as fast as a regular SATA connection, it is fast enough to enjoy the benefit of an SSD. The throughput of a Firewire 800 connection is about 70 MB/s, way lower than an SSD is able to deliver. However, SSDs are about (random) IO performance and in that case, the Firewire connection is almost never a true bottleneck. I would have bought a thunderbolt external HDD case if it would exist. So that's why I went with a FW 800 casing. I bought this case. Although FW 800 does supply power to run the SSD, I had to supply power to the DC input also, otherwise I got random lockups. By suplying extra power, the system is now rock solid for a week. I made a blog post about this also. http://louwrentius.com/blog/2011/07/cheap-solution-for-putting-an-ssd-in-an-imac/ I'm very happy with this setup. This way I can use my 'old' Intel SSD from my previous system with my Mac. The system boots from the 'boing' to the login screen in about 17 seconds. Login is almost instantaneously. I hope somebody finds some use in this. Maybe other people had luck with other FW 800 casings?