On 27-aug-2006, at 3:29, Cubeistan wrote: > Thanks again John. This puppy has FW and USB, IDE & S-ATA, so I'd > think it should work. Oh am using a MacBook but that shouldn't > matter, should it? The MacBook does matter. Intel based Mac's use a different partition scheme than PowerPC based Mac's. A disk formatted on a PowerPC Mac will report on an Intel Mac the error you mentioned in your first message ('OS X cannot be installed on this disk') You will have to repartition the disk on the MacBook if you want to boot from that drive with the MacBook. Click on the Options button to choose the correct partition scheme (GUID Partition Table). You can use it now as a standard external drive on the MacBook and PowerPC based Mac's. If you repartition it with the new scheme I think you lose that capability. Peter van Peursem sirius61 at nerdshack.com -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 2373 bytes Desc: not available Url : http://listserver.themacintoshguy.com/pipermail/x4u/attachments/20060827/3ff84443/smime.bin