Hello there! A week ago my hard drive (Toshiba 750 GB 7200 RPM) died. I have now bought a new Sandisk Extreme 240 GB SSD, but cant figure out how to install Mountain Lion. Here is the solutions i tried so far. On a friends mac I downloaded the install for Mountain Lion and placed the install on a external drive. I replaced the internal broken harddrive with the new SSD. When reaching disk utility after booting I cant get to partition the new SSD and i read somewhere on the internet that apple blocks some internal SSD in disk utility since it can destroy them? Anyways - I took the SSD out and connected it to my MacBook with a StoreJet sata to USB. This granted me the opportunity to partionen, erase and so in Disk Utility which also led to permission to make a partition where I could install Mountain Lion. The installation went fine and it booted fine from the external SSD. BUT when i replace the SSD internal inside the MacBook and tries to boot from the SSD I get a "No Access" sign after the Apple. After this I tried to make a partition external again and put the SSD back internal before installing ML. But when booting up I can't. Anyone out there got a solution to this? Here is my theory: When the SSD is connected external trough the StoreJet Sata to USB I see the name "Store Jet" in Disk Utility instead of "Sandisk SSD.....". When I check disk utility, when the SSD is connected internal the name in is "Sandisk SSD..." Could the name change be causing the "No access" sign since it cant find the right files somehow? Or do anyone know how to get the SSD working internal?