Migrated old back-up to new MacBook Pro, but now new machine doesn't recognize old back-up

Question

So last night I migrated my old back-up to my new MacBook Pro, but this morning my new machine doesn't recognize my old back-up. I'd rather not erase and back-up from scratch for numerous reasons (losing the old data, time, etc).
Any suggestions? I'll bet this is a realatively common issue?
Thanks in advance for any help!
-Ron

Answer 1

Looking back, at your original posts....it said it needed 774 GB?? is that at all reasonable for a full backup of your system??
Maybe there's something more than meets the eye?
Also maybe we can figure out what went wrong with the tmutil command. It is possible that you may have to use additional options.
But first le's see who owns the old backup....
From the terminal command line try this:
sudo xattr -l "path to your backup"
Where "path to your backup" is tha same path exactly as used in the tmutil command, that is:
/Volumes/"Backups Device Name"/Backups.backupdb/"Backup Name"
You should get something like this for output:
com.apple.backupd.BackupMachineAddress:
00000000  30 30 3A 31 64 .. .. .. .. .. .. .. .. .. .. ..  |00:1d:..:..:..:.|
00000010  34 00                                            |4.|
00000012
com.apple.backupd.HostUUID:
00000000  41 34 32 30 43 .. .. .. .. .. .. .. .. .. .. ..  |A420Cxxxxxxxxxxx|
00000010  .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..  |xxxxxxxxxxxxxxxx|
00000020  32 37 37 42 00                                   |277B.|
00000025
com.apple.backupd.ModelID: MacPro3,1
The "BackupMachineAddress" is the MAC address of the Ethernet port your mother board.
You can find the MAc address in About this Mac-> More Info. -> System report -> Network -> Ethernet 1
The "HostUUID" is the identifier of your mother board.
You can find it in About this Mac-> More Info. -> System report ->Hardware Overview  [that's the first thing that shows when you select System report]
These are the way the connection of the backup to a machine is made.
Now the tmutil inheritbackup comand should have set them to the correct values for your new machine.
But let's' see if any of them match the new machine and then see of we haveany more options.
Steve