Does time machine see a new comp the same way as a comp with new logic b

I've been dealing with this a number of days. my computer got a new hard drive and a new logic board as well as lcd display. I can reformat and start backing up my computer, but i can't access my backups on my time machine. From posts i see there is an issue with having a logic board replaced and time machine thinks its a new computer so you have to use the terminal to type commands to get it to work with your computer again. (which i have tried unsuccessfully to do.) But on the forum I see that its not an issue for getting a new computer for you to access your time machine and migrate your information over. What is the difference if both are seen as a new machine by time machine? I have mainly some photos i would like to get off my back up. Thank goodness I have some of them backed up on dvds but there are still many on my back up that I can't get to . Thanks.

Vivienne,
Obviously, you have the Mac up and running again, but you are using a fresh User Account. Correct? One that is missing all of your old data (Music/Pictures/Email/Contacts, etc...)?
What happens if you do the following:
*Using Time Machine After Initial Launch of New Mac*
If you have already created a User Account on the new Mac using a DIFFERENT Username and Password from the old Mac, then do the following:
Attach the hard disk containing the previous Macs' Time Machine backups to the new computer.
Go to Applications --> Utilities --> and launch Migration Assistant.
At the welcome dialogue click "Continue." You may be required to enter your Admin password.
For Migration Method choose "From a Time Machine backup or other disk".
Select the hard disk containing the previous Time Machine backups. (Give Migration Assistant some time as it scans the disk for eligible data to migrate.)
Now select which User Accounts you would like to migrate over.
However, if you have already created a User Account on the new Mac using the SAME Username and Password as the old Mac, then you will need to do this:
Create a new User Admin Account on the new Mac with a completely unique name.
Backup any important files that have been created using the first User Account on the new Mac.
Now, delete the first User Account you created on the new Mac - The one that is identical to the old Mac.
Finally, use Migration Assistant as described above to move the old User Account data over from the Time Machine backups.
*Full Backup After Restore*
Bear in mind that in all cases Time Machine will perform a full backup after a full restore. This is normal. Time Machine will resume incremental backups after the full backup has completed. To view previous backups, Control-click or right-click the Time Machine icon in your Dock or Option-click the Time Machine menu extra and Choose "Browse Other Time Machine Disks," then select your previous backup volume. You will enter Time Machine and be able to browse your previous back ups and restore files. (http://support.apple.com/kb/TS1338)
Let us know if this was helpful.
Cheers!

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You can do it. This article from Macworld will be helpful to you:
http://www.macworld.com/article/161087/2011/07/install_lion_over_leopard.html
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How does Time Machine handle alias files on the backup volume?

I have been trying to find some info on how Time Machine handles alias files on the backup volume, but can't find anything on that topic. Neither here in this discussion or at the Apple support pages.
My concern is if an alias file on the backup volume is backed up »as is«, or if it is resolved and the original file is backed up? The last would be most annoying as this will make the size of the backup much larger.
Even though I do not know of folders having been renamed (which will cause that folder and all its content to be backed up again) Time Machine often backs up a surprisingly large amount of data, so I suspect that alias files could be resolved.
Any info on this will be appreciated.

Alias files are NOT followed, AFAIK.
For more info on how TM works, see this ars technica review.
Good luck!
Message was edited by: joshz

Time Machine Restore After New Logic Board

Older iMac (2009) had hard drive and logic board replaced. Running latest system (10.10.2) before and after logic board replacement.
When attempting to restore from a Time Machine backup made prior to the new logic board, although the iMac sees the Time Capsule and the "Data" file, attempts to proceed with the restore are met with error message "There was a problem connecting to the server [name of Time Capsule] - contact your administrator."
Any experience with this issue? Anybody successfully perform a restore following a new logic board?
Thanks very much.

I would refer you to visit Pondini's Time Machine FAQ for help with Time Machine and full system restore. It also provides instruction on how to restore a backup from another system or Time Machine backup drive.

Need to reformat hard drive and restore Time Machine backup. What's the safest way to proceed?

I have a Mac desktop, purchased in 2007. We upgraded last year to Snow Leopard. It has been slow for a few days, and yesterday wouldn't go past the gray screen. Tried booting in recovery with no success, same for safe mode. Even tried fsck -fy. Eventually went to the Snow Leopard install disk and tried to repair disk, but got an "Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files" message. I've got Time Machine back ups on an external hard drive, but I want to make sure I do this right and don't make things worse. What steps do I need to take?

In most of the cases, that Disk Utility message means that the hard drive is damaged.
However, you can try to erase the disk and restore the Time Machine backup to see if it works. Follow these steps:
1. Insert the Snow Leopard DVD and press the C key while your Mac is starting.
2. Go to Utilities menu > Disk Utility, select Macintosh HD on the sidebar, go to Erase tab and erase the disk. If there's an error during this step, take the Mac to an Apple Store to get a new hard drive.
3. Close Disk Utility, go to Utilities menu, choose the option to restore a Time Machine backup and follow the steps.
If the computer is slow after doing this, take the Mac to an Apple Store as soon as you can

Can Time Machine's backup disc be the same as the start-up disc?

All my files are stored on a network drive, but I'd like to keep backups on my local startup disc. Is this possible. Don't see my local disc as an alternative in the Time Machine set ukp.

Linc Davis wrote:
It's not possible at all, even if you partition the drive.
Actually, it is. As you say, not very sensible, but it can be done.
TM will send this message when you set it up that way:

Using Time machine and external HD at the same time

Dear All
I'm intending to buy an external HD both for the purpose as a external HD and for time machine use.
Is this possible? If so, how do I configure it?
Thanks.
Jojos

Apple Partition Map works just fine on an external HD (including booting from a clone made with SD). GUID is only required for the internal HD on Intel-based Macs. There is a lot of misinformation going around on this topic.
Is Apple spreading the misinformation Barry? This OP originally asked about Time Machine and an external drive. He later asked about bootable backups. I tried to take all that in consideration in my reply. Apple has consistently said in everything that I have read in the Knowledge Base that when using Time Machine with an Intel Mac to use the GUID partitioning scheme.
There are also recent posts around these forums, as well as around the internet, where folks have had bootable volumes that were not GUID and they encountered strange behavior on their Macs that they report was resolved by making sure that their bootable volumes on external drives were in the GUID partitioning scheme.
Dah•veed

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Drive Preparation
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I replaced the original hdd in my early 2008 iMac. I can't move my files that were backed up with Time Machine to my new hdd using Migration Assistant. When prompted to select the "from drive", the ext. hhd does not appears as a selection. Please help!!

I'd recommend staring over, Pondini has created an excellent guide on how to use Setup Assistant. I'd recommend begin reading Pondini Setup Assistant tips where he talks about "Second Chance." Assuming your Time Machine backup is sound the restore should be very smooth.
Roger

How does time machine use the external disk space??

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similarly, does it keep stuff from the first back up ever, plus anything new or modified in the following back ups, then when it is full, does it let just the oldest files drop off? or does it drop off everything from the initial backup? that is, if I had 20mb of changes would it erase only 20mb of data to make the new data fit, or would it erase all 600gb from say "day one"?
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<Email Edited by Host>

See Pondini's TM FAQs for starters.

Does Time Machine backs up also the format of the volume?

Since many softwares cannot be installed on case-sensitive volume, so I erased the whole volume and install OS X Mountain Lion with format of OS Extended(Journaled). Then I use Time Machine backing up to the new system.
But now when I'm trying to install Adobe softwares, here's what I see.
still, It hints that this is a case-senstive volume.
Then I go to check the Disk Utility:
Very weired! It shows as "Mac OS Extended(Journaled) in the Drop-down list, but "case-senstive, journaled) in the discription in bottom.
Anyone has some clues of this??
Thanks.

As well as doing backups and other things, you can use Disk Utility to create RAID volume sets.
Returning to the image you posted, RAID is selected at (1) and so it thinks you are about to create a RAID volume. The format for the new volume would be as shown at (2). On the other hand, the volume at (3) is selected and it is that volume's format which is shown at (4).
I don't think you wanted to create a RAID set; maybe Disk Utility got a click you didn't intend for it. RAID is explained a bit in the Disk Utility help.
I have found a lot of good information about Time Machine at this site:
http://pondini.org/OSX/Home.html
To go back to your original question:
> Does Time Machine backs up also the format of the volume?
My guess would be "No"; but see pondini.org for a definitive answer.

Does time machine see a new comp the same way as a comp with new logic b

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