Time Machine with two hackintoshes - not working?

[teknokracy]

So I've built two Hackintoshes in the house, and I have a single 500gb external drive which I was using to back up one of them before I built the second one.

 

Here's the problem. When I went to go and back up the 2nd machine (newest one), it thinks that it's the same computer as the first one, and starts to back up in the same backup folder as the 1st computer (basically it considers the previous backup as belonging to the same computer, takes a while to calculate "changes", and then backs up the whole system).

 

I checked the UUID and the serial number, and they are different on both machines. They both have different user names, and different system names. They are both MacPro3,1 but that shouldn't create an issue.

 

What's going on here? How can I fix it? the backups work, it's just thinking that both are the same computer. The opposite happens when I go to back up on the 1st original Hackintosh - it thinks the 2nd one's backups are its own, and creates another backup in sequence.

 

I know this works with real Macs, it just creates a new folder for each computer name under Backups.backupdb....

[MacUser2525]

Here's the problem. When I went to go and back up the 2nd machine (newest one), it thinks that it's the same computer as the first one, and starts to back up in the same backup folder as the 1st computer (basically it considers the previous backup as belonging to the same computer, takes a while to calculate "changes", and then backs up the whole system).

 

How can I fix it?

 

No idea why it is doing it but the easy solution is to partition the external into two differently named volumes, set one for the first machine in its preferences the other for the second machine then the problem of it getting mixed up is solved.