Setup as new Mac but use same Time Machine

tburk32

macrumors member
Original poster
Oct 18, 2011
67
0
Hi all,

I was wondering if anyone had any solutions for setting up a Mac as new after a clean install of El Capitan and utilizing the same Time Machine backup? I don't want to restore or migrate the information, but I'd like to make sure I don't lose availability to all of my old files/backups.

In my research I found a script that is supposed to help but i'm not familiar with scripts or how to use them

sudo tmutil associatedisk -a "/Volumes/Macintosh HD" "/Volumes/Time Machine Disk/Backups.backupdb/John Doe's MacBook/Latest/Macintosh HD"

edit: here is the source https://simon.heimlicher.com/articles/2012/07/10/time-machine-inherit-backup-using-tmutil
 
Last edited:

!!!

macrumors 6502
Aug 5, 2013
397
231
Hi all,

I was wondering if anyone had any solutions for setting up a Mac as new after a clean install of El Capitan and utilizing the same Time Machine backup? I don't want to restore or migrate the information, but I'd like to make sure I don't lose availability to all of my old files/backups.

In my research I found a script that is supposed to help but i'm not familiar with scripts or how to use them

sudo tmutil associatedisk -a "/Volumes/Macintosh HD" "/Volumes/Time Machine Disk/Backups.backupdb/John Doe's MacBook/Latest/Macintosh HD"

edit: here is the source https://simon.heimlicher.com/articles/2012/07/10/time-machine-inherit-backup-using-tmutil
No. Just select the disk in the Time Machine preferences. It will treat it as if you backup multiple computers to the same disk.
 

tburk32

macrumors member
Original poster
Oct 18, 2011
67
0
No. Just select the disk in the Time Machine preferences. It will treat it as if you backup multiple computers to the same disk.
If I use the same disk, won't it create a new sparse bundle and I won't be able to access the old one in the time machine interface?
 

!!!

macrumors 6502
Aug 5, 2013
397
231
If I use the same disk, won't it create a new sparse bundle and I won't be able to access the old one in the time machine interface?
You cannot access other Mac backups through the time machine interface. This is for security. You can access it through the Finder, however.
 

RabidMacFan

macrumors regular
Jun 19, 2012
187
42
California
I did a clean install to El Capitan when it came out, and I'm using the same Time Machine backup I had before. I'm not sure exactly what I did, but you may want to try this:
1. Set your computer name the same as the old system in System Preferences > Sharing (you can change it later)
2. In System Preferences > Time Machine, select the same disk you were using before

It should recognize that there is an existing time machine backup for the same computer name, and it will ask you if you want to use the same time machine backup, or create a new one.

Like I said, I set this up a while ago, so I might be wrong. But I would give this a try.