APM to GUID

APM and GUID are not formatting options, they are partition schemes.

APM is for PPC macs, and GUID is for Intel macs.

You need to use whichever one corresponds to your hardware type, or you could end up with a mac that cannot boot to it's own hard drive.

I don't think leopard will install on an drive if it has the wrong partition type. I had the same problem and noticed that my drive was APM instead of GUID on my MacBookPro. I had replaced my HD with a larger one, and must have not formatted it correctly. Once I changed the partition type I could install leopard just fine. I then used the migration tool to copy my data back. So far so good after that.

I don't see the issue here. If you have a PPC mac, you need to leave it on APM.

It should install perfectly fine. I upgraded my PPC imac with no issues.

Weird. Wonder why your drive was apm? Oh well. Hopefully it works now, good luck!

You can clone to and then boot from an APM drive, even an Intel machine - I have an APM FW drive on an intel iMac with both Tiger and Leopard on it and it boots. You just cannot install it on the drive (for Intel).

Repartitioning is destructive - so either move the data off the drive and repartition including GUID or install to the internal drive and use Carbon Copy Cloner (Super Duper does not seem to work well with Leopard right now) to clone that installation to the APM drive and leave it be.

Super Duper is acting odd- not all programs wind up on the dock and when doing an update clone (with the paid version) instead of maybe a few hunderd MB updating there is like 1/2 the soruce drive being copied over again though it could not have changed 50% in 5 minutes. And the end result is the basic dock and not the way it looked.

CCC both full and copy specfic files (after a full clone) works fine.

Sorry to ask so far past the date on this but I'm having that same problem... I also bought a larger HD (200GB), cloned it and replaced the OEM HD (100GB). Went to install Leopard and was stopped. But, my DU will not let me format into GUID (everything, the unit and name grays out when selected). Did you use DU, or another program. I have cloned and backed up everything, and ready to upgrade. Thanks for your help!

Use Apple's Disk Utility (in /Applications/Utilities) to check these items on your target drive:

• the Volume Format (in the 'Erase' tab)

• the Partition Scheme (in 'Partition' tab > "Options..." button)
The 'Partition' tab only appears if in the left-hand column you have selected the Drive (the upper item of a group) and not a volume within/beneath it.

*Mac OS Extended (Journaled)

*Apple Partition Map

No matter what I select the option to start does not become available.

I am starting to think that I need to re-install the original HD, put the new one in a enclosure and reformat it there to GUID. Then, put it back in the MBP!

Thanks!

Did you select a partitioning scheme? If so, I don't know what to tell you. Alternatively, put the old HD into a bootable enclosure and restore it to the new HD, using DU.