When I bought an Apple Mac (about 2 months ago) I used Boot Camp to install Windows 7 (so I could dual-boot). Originally I'd intended to use Drive Backup to create extra FAT32 partitions that could be shared between both OS's (since both Windows and OS-X support reading and writing of FAT32). I bought DB10 because I was assured by Paragon that DB10 understands the GPT partitioning model used by Apple Macs. But I soon realised that FAT32 partitions created by DB10 were strangely invisible to the Mac's OS-X (it just sees the partitions as free space). Consequently I had to create the partitions on an external (MBR) drive. Up until this afternoon, OS-X's partition manager (iPartition) agreed with DB10 that the main (internal) Mac drive looked like this:- Code: PARTITION1 PARTITION2 FREESPACE1 PARTITION3 FREESPACE2 EFI (200MB) APPLE HFS (88GB) UNALLOCATED (128MB) BOOTCAMP NTFS (88GB) UNALLOCATED (287GB) This afternoon I decided to make a copy of the HFS partition (using DB10). My hope was that the final disk would look like this:- Code: PARTITION1 PARTITION2 FREESPACE1 PARTITION3 PARTITION4 FREESPACE2 EFI (200MB) APPLE HFS (88GB) UNALLOCATED (128MB) BOOTCAMP NTFS (88GB) APPLE HFS COPY (88GB) UNALLOCATED (199GB) The operation appeared to go okay - but after I re-booted into OS-X it still shows exactly the same partition layout that it had before I started! Much more worrying though, is that DB10 is now showing these partitions:- Code: PARTITION1 PARTITION2 FREESPACE1 PARTITION3 PARTITION4 FREESPACE2 EFI (200MB) UNFORMATTED (88GB) UNALLOCATED (128MB) BOOTCAMP NTFS (88GB) APPLE HFS COPY (88GB) UNALLOCATED (199GB) Note that after copying PARTITION2, DB10 suddenly thinks that the original partition is unformatted (which it can't be because it contains OS-X which still boots). What on earth has gone wrong here? My first impression is that DB10 might have created the HFS copy - but forgot to give it a new GUID. So maybe I now have two partitions with the same GUID. Does that seem likely? Why else would it now think that a perfectly good partition is suddenly unformatted??