Does time machine back up the OS?

Wanting to install a new hard drive in my Mac Book Pro. Will Time Machine book up the OS on my current hard drive, so that when I do the reinstall it will boot up & operate as before, or do I need to use something like SuperDuper or Carbon Copy Cloner?

Posted on Nov 13, 2012 2:38 PM

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36 replies

Nov 17, 2012 1:14 PM in response to sootshe

when I put the new hard drive in, I want to install a fresh copy of Lion on my computer. This seems to be such a difficult thing to do, as no discs are provided from Apple.


You need something to boot from.

As I noted before, just download -> Recovery Disk Assistant and install it on an external drive.

Replace the original internal drive.

Hold Option and start teh computer then select the Recovery drive to boot from.

Then simply install Mountain Lion.


When booting from the Recovery drive, you have 4 options.

  1. Restore from a TM backup.
  2. Install new copy of Mac OS X
  3. Get Help
  4. Disk Utility

Nov 18, 2012 2:12 PM in response to Chris CA

Chris CA



when I put the new hard drive in, I want to install a fresh copy of Lion on my computer. This seems to be such a difficult thing to do, as no discs are provided from Apple.


You need something to boot from.

As I noted before, just download -> Recovery Disk Assistant and install it on an external drive.

Replace the original internal drive.

Hold Option and start teh computer then select the Recovery drive to boot from.

Then simply install Mountain Lion.


When booting from the Recovery drive, you have 4 options.

  1. Restore from a TM backup.
  2. Install new copy of Mac OS X
  3. Get Help
  4. Disk Utility


Chris,


I tried booting from the Recovery Disk Assistant to see what happens.


I got the four options you describe above & stopped there, as I didn't want to wipe everything from my HD. (I haven't put the new SSHD in yet).


I'm having trouble with - "Then simply install Lion"


If I select option 3 "Install new copy of Mac OS X", will this automatically install a new copy of OS X on my computer?


I'm having trouble getting my head around how it will do this.


Does option 3 mean I have to have a copy of Lion to enable it to install it on my computer or is it on the USB stick I have previously created with Recovery Disk Assistant??

Nov 13, 2012 3:10 PM in response to sootshe

I did not say "do it twice." I said they are not the same. They are functionally different. However, what's wrong with two different backups. You can never have too many.


CCC and other similar utilities can make directly bootable clones identical to your usual main drive. Time Machine cannot do that. Time Machine also requires more space on a backup drive - at least twice the size of the drives you backup compared to CCC, etal.

Nov 13, 2012 3:10 PM in response to Niel

If I'm understanding this correctly, if I use Time Machine I'll have to wait until I reload all the OS & saved files, which are backed up on Time Machine, before I can use the computer again, whereas if I use SD or CCC I can use the computer almost straight away from a direct boot from the drive where they are stored?


If my assumption here is correct then it's purely a time issue, but the end result will be the same?

Nov 13, 2012 3:22 PM in response to Niel

Thanks Niel,


So when I install the new HD, can you give me a brief run down of how to boot from the Time Machine backup & restore everything. I know you have to start the computer while holding down certain keys, but not sure which ones. I can follow the procedure from there once I get the initial process started. I have a 2012 Mac Book Pro with Lion.

Nov 13, 2012 3:30 PM in response to Niel

If you are restoring a backup made by a Mac to the same Mac

With your backup drive connected, start up your Mac from the Recovery system (Command-R at startup) or Mac OS X v10.6 installation disc. Then use the "Restore From Time Machine Backup" utility.


My computer didn't come with any discs, so I can't boot that way.


The link you provided says "press command R" at startup, then restore from TM.


Will this work OK?

Nov 13, 2012 3:37 PM in response to Niel

Thanks Niel,


I really appreciate your help, but as you can tell, I'm feeling my way here, so I think I'll drop my computer into the Mac store & get them to do a fresh install. I have all the files backed up on a portable HD, so I can restore all that quite easily.


I only have a couple of apps that I can download quickly & I'll be up & running again.


My computer is for a dedicated music playback system, so I only have Amarra & all my music files to put back on to it.


Thanks again,

John

Nov 14, 2012 5:48 AM in response to sootshe

Ok.. don't get confused here. Your Lion system has a partition on it called Recovery HD. You can boot into it the way you just did or by pressing Command+R at startup. The Recovery HD is hidden.


The OS X Recovery Disk Assistant is an application that you download from Apple and run which will copy that Recovery HD onto a bootable USB thumb drive (formated as Mac OS Extended Journaled with the GUID partition table) so that in case your hard drive's Recovery HD becomes corrupt or disappears, you have the thumb drive you can use to boot from and use the OS X Utilities.


Hope this helps.

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Does time machine back up the OS?

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