Purge all Time Machine backups for a single user

On my iMac I have my regular user account and a separate "admin" account that I use when things get goofy and I need to back completly out of my system and make sure nothing is in the way when doing admin related tasks.
I was logged in and working on the "admin" account the other day and was waiting for a CCC restore of a disk to complete. When I returned I saw a Time Machine notice that it had completed the backup of ~250GB of data. Since this is only an admin account there is no data on the system to backup, so I'm assuming it backed up a bunch of system files.
Since these files should have already been backed up by my "user" account I want to clean off that 'wasted' 250GB of Time Machine backup, but I am afraid to go in and start deleting items from the TimeMachine screen as I don't want it to delete them from the disk in general.
I have already turned off TimeMachine for the "admin" account but I don't see anywhere in the preferences to allow me to purge all backups for this user.
Or, am I being too worried about the disk space and that 250GB was already covered by the "user" account versions of the files and that Time Machine has built in "deduplication" features?

I don't recommend deleting Time Machine snapshots. If you have multiple backup volumes, which you should have, and you need to repurpose one of them, you should just erase it. But if you want to try it anyway, and if you're running OS X 10.8 or later (not any older version), see below.
Don't attempt this procedure unless you have at least one other complete backup of all the data. You should have another backup anyway — one is never enough to be safe.
Navigate in the Finder to your backup disk, and then to the folder named "Backups.backupdb" at the top level of the volume. If you back up over a network, you'll first have to mount the "sparsebundle" file containing your backups by double-clicking it. Descend into the folder until you see the snapshots, which are represented by folders with a name that begins with the date of the snapshot. Drag the ones you don't want to the Trash and empty. Sometimes, for unknown and unpredictable reasons, the Trash will fail to empty with a cryptic error message. I don't know of any way to recover from that condition except to erase the backup volume and start over.

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Can I use a single external drive to maintain time machine backups for two Mac computers?

Hello
We have an older mac mini and macbook air. I have one Western Digital external USB drive. Can I use the same drive to hold and maintain time machine backups for both machines?
I already have the macbook air time-machined on the WD drive. I now want to backup the mac mini onto the same drive. Is it going to over write the time machine backup or is the software smart enough to maintain two separate files, partitions, whatever it does..?

It will maintain separate backups. Note that it's generally advisable to use separate drives for best practice backup, but yes, it will work for both computers, provided you have enough space (need generally 2-3 times the total used file space for both Macs).
Matt

I have a mid2009 MacBook Pro for which I have been using a USB WD HD for Time Machine. I'd like to get a wireless HD and start a new Time Machine backup for this Mac and retire the 5 year old WD drive. Can I start over?

I have a mid2009 MacBook Pro running Mavericks for which I have been using a USB WD HD for Time Machine. I'd like to get a wireless HD and start a new Time Machine backup for this Mac and retire the 5 year old WD drive. Can I start over?

no archive/ backup is perfect, HD clones can be set to make incremental additions, same as time machine however, though they are more time involved in doing so.
See the + and - of all data backup/ archives below and "spread it around".... or the "dont put your eggs all in one basket" philosophy.
Peace
Data Storage Platforms; their Drawbacks & Advantages
#1. Time Machine / Time Capsule
Drawbacks:
1. Time Machine is not bootable, if your internal drive fails, you cannot access files or boot from TM directly from the dead computer.
2. Time machine is controlled by complex software, and while you can delve into the TM backup database for specific file(s) extraction, this is not ideal or desirable.
3. Time machine can and does have the potential for many error codes in which data corruption can occur and your important backup files may not be saved correctly, at all, or even damaged. This extra link of failure in placing software between your data and its recovery is a point of risk and failure. A HD clone is not subject to these errors.
4. Time machine mirrors your internal HD, in which cases of data corruption, this corruption can immediately spread to the backup as the two are linked. TM is perpetually connected (or often) to your computer, and corruption spread to corruption, without isolation, which TM lacks (usually), migrating errors or corruption is either automatic or extremely easy to unwittingly do.
5. Time Machine does not keep endless copies of changed or deleted data, and you are often not notified when it deletes them; likewise you may accidently delete files off your computer and this accident is mirrored on TM.
6. Restoring from TM is quite time intensive.
7. TM is a backup and not a data archive, and therefore by definition a low-level security of vital/important data.
8. TM working premise is a “black box” backup of OS, APPS, settings, and vital data that nearly 100% of users never verify until an emergency hits or their computers internal SSD or HD that is corrupt or dead and this is an extremely bad working premise on vital data.
9. Given that data created and stored is growing exponentially, the fact that TM operates as a “store-it-all” backup nexus makes TM inherently incapable to easily backup massive amounts of data, nor is doing so a good idea.
10. TM working premise is a backup of a users system and active working data, and NOT massive amounts of static data, yet most users never take this into consideration, making TM a high-risk locus of data “bloat”.
11. In the case of Time Capsule, wifi data storage is a less than ideal premise given possible wireless data corruption.
12. TM like all HD-based data is subject to ferromagnetic and mechanical failure.
13. *Level-1 security of your vital data.
Advantages:
1. TM is very easy to use either in automatic mode or in 1-click backups.
2. TM is a perfect novice level simplex backup single-layer security save against internal HD failure or corruption.
3. TM can easily provide a seamless no-gap policy of active data that is often not easily capable in HD clones or HD archives (only if the user is lazy is making data saves).
#2. HD archives
Drawbacks:
1. Like all HD-based data is subject to ferromagnetic and mechanical failure.
2. Unless the user ritually copies working active data to HD external archives, then there is a time-gap of potential missing data; as such users must be proactive in archiving data that is being worked on or recently saved or created.
Advantages:
1. Fills the gap left in a week or 2-week-old HD clone, as an example.
2. Simplex no-software data storage that is isolated and autonomous from the computer (in most cases).
3. HD archives are the best idealized storage source for storing huge and multi-terabytes of data.
4. Best-idealized 1st platform redundancy for data protection.
5. *Perfect primary tier and level-2 security of your vital data.
#3. HD clones (see below for full advantages / drawbacks)
Drawbacks:
1. HD clones can be incrementally updated to hourly or daily, however this is time consuming and HD clones are, often, a week or more old, in which case data between today and the most fresh HD clone can and would be lost (however this gap is filled by use of HD archives listed above or by a TM backup).
2. Like all HD-based data is subject to ferromagnetic and mechanical failure.
Advantages:
1. HD clones are the best, quickest way to get back to 100% full operation in mere seconds.
2. Once a HD clone is created, the creation software (Carbon Copy Cloner or SuperDuper) is no longer needed whatsoever, and unlike TM, which requires complex software for its operational transference of data, a HD clone is its own bootable entity.
3. HD clones are unconnected and isolated from recent corruption.
4. HD clones allow a “portable copy” of your computer that you can likewise connect to another same Mac and have all your APPS and data at hand, which is extremely useful.
5. Rather than, as many users do, thinking of a HD clone as a “complimentary backup” to the use of TM, a HD clone is superior to TM both in ease of returning to 100% quickly, and its autonomous nature; while each has its place, TM can and does fill the gap in, say, a 2 week old clone. As an analogy, the HD clone itself is the brick wall of protection, whereas TM can be thought of as the mortar, which will fill any cracks in data on a week, 2-week, or 1-month old HD clone.
6. Best-idealized 2nd platform redundancy for data protection, and 1st level for system restore of your computers internal HD. (Time machine being 2nd level for system restore of the computer’s internal HD).
7. *Level-2 security of your vital data.
HD cloning software options:
1. SuperDuper HD cloning software APP (free)
2. Carbon Copy Cloner APP (will copy the recovery partition as well)
3. Disk utility HD bootable clone.
#4. Online archives
Drawbacks:
1. Subject to server failure or due to non-payment of your hosting account, it can be suspended.
2. Subject, due to lack of security on your part, to being attacked and hacked/erased.
Advantages:
1. In case of house fire, etc. your data is safe.
2. In travels, and propagating files to friends and likewise, a mere link by email is all that is needed and no large media needs to be sent across the net.
3. Online archives are the perfect and best-idealized 3rd platform redundancy for data protection.
4. Supremely useful in data isolation from backups and local archives in being online and offsite for long-distance security in isolation.
5. *Level-1.5 security of your vital data.
#5. DVD professional archival media
Drawbacks:
1. DVD single-layer disks are limited to 4.7Gigabytes of data.
2. DVD media are, given rough handling, prone to scratches and light-degradation if not stored correctly.
Advantages:
1. Archival DVD professional blank media is rated for in excess of 100+ years.
2. DVD is not subject to mechanical breakdown.
3. DVD archival media is not subject to ferromagnetic degradation.
4. DVD archival media correctly sleeved and stored is currently a supreme storage method of archiving vital data.
5. DVD media is once written and therefore free of data corruption if the write is correct.
6. DVD media is the perfect ideal for “freezing” and isolating old copies of data for reference in case newer generations of data become corrupted and an older copy is needed to revert to.
7. Best-idealized 4th platform redundancy for data protection.
8. *Level-3 (highest) security of your vital data.
[*Level-4 data security under development as once-written metallic plates and synthetic sapphire and likewise ultra-long-term data storage]
#6. Cloud based storage
Drawbacks:
1. Cloud storage can only be quasi-possessed.
2. No genuine true security and privacy of data.
3. Should never be considered for vital data storage or especially long-term.
4. *Level-0 security of your vital data.
Advantages:
1. Quick, easy and cheap storage location for simplex files for transfer to keep on hand and yet off the computer.
2. Easy source for small-file data sharing.

Remove all time machine backups from a certain date and backward

Right, so here's what I want to do: I want to navigate back to a specific date -- for arguments sake let's say June -- and remove all time machine backups from that date and earlier. Is there an easy way to do so without going through every entry in time machine and "removing backup"?
I want to migrate my time machine backups to a new drive, but realize I don't really need EVERYTHING here since its for an older machine. So what I'd like to do is get my rather large 1.5 TB time machine backup down to a more manageable size and then migrate it to a new drive.

I don't recommend deleting Time Machine snapshots. If you have multiple backup volumes, which you should have, and you need to repurpose one of them, you should just erase it. But if you want to try it anyway, and if you're running OS X 10.8 or later (not any older version), see below.
Don't attempt this procedure unless you have at least one other complete backup of all the data. You should have another backup anyway — one is never enough to be safe.
Navigate in the Finder to your backup disk, and then to the folder named "Backups.backupdb" at the top level of the volume. If you back up over a network, you'll first have to mount the "sparsebundle" file containing your backups by double-clicking it. Descend into the folder until you see the snapshots, which are represented by folders with a name that begins with the date of the snapshot. Drag the ones you don't want to the Trash and empty. Sometimes, for unknown and unpredictable reasons, the Trash will fail to empty with a cryptic error message. I don't know of any way to recover from that condition except to erase the backup volume and start over.

How to select correct time machine backup for migration assistant

We have two MacBooks backing up to one Time Capsule using time machine: let's call them H and R.
I have had to reinstall Leopard on Macbook H and am now trying to restore using Migration Assistant.
Migration Assistant finds the Time Capsule and identifies that there are two Time Machine Backups, but doesn't give an option to select the one to use.
Whenever I click 'Continue' it does the 'Checking time machine backup' (for hours), then brings up the data to restore, but every time it comes up with the data and settings from Macbook R.
How can I tell Migration Assistant which Time Machine Backup I want to use?

Brilliant. That was it.
I used the other MacBook to run Disk Utility on my backup volume and repaired it: #A5 is bang on.
Then, Setup Assistant saw both backups and let me select the one I wanted. It's now transferring my stuff.
Very relieved and extremely grateful.
Your apple tips should come with every mac and time capsule.

I can see Time Machine backups for only last 10 days.

I lost majority of my Documents content.
To my surprise Time Machine has partial backup of that folder for only last 10 days.
Can I somehow access previous backups (that are not visible)?
thx

When you Enter Time Machine, do the older backups appear in the timeline on the right at all?
If they do, but the little "tick marks" are faded-out and you can't select them, see the pink box in Time Machine - Frequently Asked Question #15A.
If the backups don't appear at all, Time Machine probably ran out of space on the backup disk, and had to delete old backups to make room for new ones. If so, your backup drive is probably too small. See #1 in the above link.

Continuity issue after Time Machine Backup for new Mac

I restore new Mac Mini (2014) with a Time Machine backup made on MacBook Air (13', 2012). Now handoff is not working on my MacBook because iCloud thinks that Mac Mini is MacBook Air now. I disabled iCloud on all devices and Handoff and other worked well on Air before I logged into iCloud on Mac Mini. What should I do to repair this issue?

That's not how you set up a new computer.
The warranty entitles you to complimentary phone support for the first 90 days of ownership.

Delete Time Machine Backups for old HD

I recently had my HD fail. Fortunatly I have a time capsule so all was not lost. A new HD was install and i sucessfully migrated my time machine backup to the new drive. However, time machine won't perform any new backups as the time capsule if full. As I understand it, a new HD is seen as a new device to backup so creates a new set of backups leaving the original ones from the previous HD untouched.
I have read various other threads about deleting old backups, but they all appear to refer to do this when you still have the original creator of the backup.
My qustion is this: How do I delete the old backups of the HD I no longer have?
Thanks.

I was recently faced with pretty well the identical problem. I found that simply moving the old backup to trash caused problems in that the trash folder could not be emptied because Time Machine backups have built-in links that, in effect, lock files from being deleted (that may not be a technically accurate description but I hope that it conveys the crux of the matter). Here's what I found to be the easiest solution:
1. Copy all files that you want to keep from the external hard drive to a folder (or desktop) on the computer.
2. Use Applications>Utilities>Disk Utility to partition the external hard drive. On a 1tB hard drive, I formatted the first partition as Mac journaled and using 750mB. The second partition used up the remainder of the drive and had the same format. I named each partition to suit my own preferences. This process deletes everything on the drive.
3. Copy the files you want to save, back from the computer to the second partition. Do this before setting up Time Machine or you may find that these files get backed up when you don't need them to be backed up.
4. Set up Time Machine to backup to the first partition. This first backup might take a few hours to complete.
This keeps backup separate from any other files that you want to store on the external hard drive and ensures that backups do not eat up disc space that you might need for other purposes. I understand that, when the backups run out of disc space, Time Machine starts to delete old ones.

How to verify time machine backups for consitency

While I had a problem w/ my HDD, I thought I would be save because I was always backing up all my data w/ time machine. After rebooting from the system disk (CD) and selcting to restore from my time machine backup, I had to learn that not all data where consistent and w/ this the restore stucked in the middle of nowhere...
Then I installed the systems brand new from the System-Disk and then tried to restore to most of my data and programs from time machine. After many hours I had my system up an running nearly as it was before, but only nearly.
Now, I would like to avoid a similar situation and look for a way to verify that for the future the backups are correct and consistent. Since Snow-Leo time machine offers an option to verify backups, but I have found that it does not work for external disks attached by USB or FireWire.
What can I do to make sure that the backups are OK?
Thanks a lot
Hansjoerg

HaJo-aus-BS wrote:
Since Snow-Leo time machine offers an option to verify backups, but I have found that it does not work for external disks attached by USB or FireWire.
Yes, that's for network backups only.
What can I do to make sure that the backups are OK?
You can tell if the File System (the various directories, catalogs etc.) is ok by repairing your backup drive, per #A5 in Time Machine - Troubleshooting.
You can "spot check" whether the Time Machine "Star Wars" display seems correct.
You can do a full system restore to another disk per #14 in Time Machine - Frequently Asked Questions, then start up from it and see if things are there and seem to work.
You can keep "secondary" backups (always a good idea). See #27 in the FAQ post for some suggestions.

I just installed Mountain Lion on my iMac that was previously running Snow Leopard. Bugt I found that some key applications no longer work, so I would like to go back to snow Leopard. I can't use time machine backups for this. what can I do?

I just installed Mountain Lion on my iMac. But In was dismayed to find that my Canon scanner software (Canoscan LIDE500F)no longer works. Nor do any of my MS offce applications. I tried to use time machine to reinstall Snow Leopard (my previous operating system), but unfortunately my time machine backups did not include system software. Also, the original system install disk that came with my iMac would not allow me to install Snow Leopard in place of Mountain Lion. I would appreciate it if somebody could tell me how to solve this problem.

The reason your Office doesn't work is because it is PowerPC code. If you will upgrade the 2004 Office to 2011 Office then that will work.
I don't understand how you managed to get your Time Machine backup to not backup the system.
Now if you still what to downgrade you will have to erase the disk and reinstall Snow Leopard. Most likely all of your application and then restore your data from Time Machine.
To me it sounds like it would be easier to upgrade your software and stay with Mountain Lion instead.
Allan

Can't find Time Machine backup for restore

Hard drive died for my MacBook, now I'm trying to restore from the Time Machine file. I have a Linux server set up for Time Machine backup. I've mounted the server to /Volumes/Time Machine, which seems to be working fine, I can see the files there. Problem is the Time Machine restore tool cannot find that drive
Any ideas, is there a way to manually point it to the backup?

Oliver Jobson wrote:
My MBP is plugged into my lan, my time machine is on another mac on my network, but after inserting the install disc in the MBP (I have upgraded to a bigger drive on my MBP) I try to restore from the time machine, but it isn't finding the TM! Does it have to be over wifi as per the on screen instructions?
No. Connect the drive directly to your Mac. See #14 in Time Machine - Frequently Asked Questions (or use the link in *User Tips* at the top of this forum).
Save that hair!

HT3231 time machine backup for migration

How do I use time machine for migration from a Macbook to Macbookair?

See 'Trnasfer info from a Time Machine backup ..." - scroll down a bit to see it here:
http://support.apple.com/kb/PH14245

Time Machine backup for old computer has been named for new computer

On my new Time Capsule, I backed up the entire disk from my older computer. While consulting with a live help technician for an unrelated problem, he had me reset the Time Capsule using the newer computer. To resume use of the Time Machine backup from my older computer, I had to gain permission . . . and subsequently discovered the reason why. Reseting with the new computer caused the backup volume to be renamed with the new computer's name.
Sooo, 1) how do I correct the naming error, and 2) will further confusion occur when I then go to back up the new computer?

It may or may not ask you to reformat the disk when you set it up as the backup for that new computer. If it does, I think you can cancel it.
What I would do is open Migration Assistant, then import your applications/documents/etc. onto the new computer, and then use the Time Machine disk for backup (formatting it if it asks you to).
You'll at least have recent files and stuff like that, which may not be as good as an incremental history but at least it's something.

Can Time Machine backups for more than one Mac be sent to the same external hard drive?

It's pretty straightforward, really. We have two Macs, both running Mountain Lion. Can we use the same external hard drive for Time Machine backups of both?

It would be best to partition the HDD - one volume for each Mac (you cannot partition a Time Capsule).
Note that by doing so, you will lose both backups should the drive fail.

Time machine backup for external hard drive

Recently purchased an external hard drive to clear up space on my iMac, to store photos and videos. Have been using Time Machine on Time Capsule to back up iMac. Have found that Time Machine backups hang up when it appears to be backing up the external hard drive. What do I need to do to get Time Machine to back up external drive as well as iMac? FWIW, I am also backing up a second iMac to the same Time Capsule.

Can you verify that....
1) External drive has been formatted in Mac OS Extended (Journaled)
2) The external drive has not been "excluded" from backups in Time Machine Options

Purge all Time Machine backups for a single user

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