Sharing a Time Machine backup between two Macs

Hi
So I was running my music production software on a first gen Mac Mini. I would store all of my project files on an external drive and backup that external drive to a second external drive using Time Machine. I had Time Machine set so that it excluded everything on the Mac Mini except my original external drive.
Now I've stepped up to the latest and the greatest Macbook Pro 15 inch. I'm running the same music production software on it and loading up all my files from the same external drive. When I go to back it up with Time Machine, it wants to start a separate backup for the Macbook Pro, even though it is only backing up the same stuff from the Mac Mini. The thing is that there aren't any system specific files being backed up, just my project files. For the life of me I can't get it to continue the original backup. I plan on using both Macs for music production and plan on using the same drive for both. I would like to back up every time I finish a session on either computer.
Is there anyway I can get Time Machine on each computer just continue one backup??
I know I can access the backup from each computer by "Browsing Other Time Machine Disks", but I want to backup, not restore.
If not, is there any other software you can recommend? Although I would hate to lose the backups that I already do have...
Thanks!
jg

That's probably a good option for you. It's not easy to keep a 3 way sync.
If you really want to keep certain files synced on your Mac Mini, you might want to look at ChronoSync. It appears it's a good backup-sync program. Don't know if will keep synced between the 2 computers and external drive without a little manuel effort, but would be easy to sync at least 2 devices, such as MacBook to Mac Mini, or MacBook to external.
If you don't need to keep synced files, then best option is to do a full TM backup of both computers. Since you have 2 externals, use one for each. You can still use TM to access files if you need, and if you have a hard drive failure, it's an easy replace drive and restore the whole computer from TM.
And don't overlook the option of File Sharing between the 2 computers to access each others files or a shared folder. That's a real easy way just to copy a few files when you need them.
Anyway, Good Luck and Happy Holidays

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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.

Can Time Machine Backup to Two Different Drives?

I have many Apple Computers, and I was wondering if it were possible to have time machine backup to two different drives.
I want it to back up My documents, Mail, and other files/folders that I access often to a partition of my internal drive every minute.
And
I want it to back up Everything on my Mac to my external each night upon connecting it to my mac.
I take my MacBook everywhere with me and I need to make sure that the files I work on the most stay Perfectly Accessible no matter what, and I don't want to sacrifice too much space for that procedure. I would rather just be able to do constant backups of my most used files and folders, and then do a system backup each night to make sure I always have what is needed.

Let me add some more observations. I use two disks, one at home (its a mounted volume on another Mac at home) and the other is a portable disk that I attach to my MBP at work. This works fine.
About your details - TM backs up every hour. If you look around you'll find some posts that give instructions on changing the frequency (I haven't paid attention to these, so I can't help you). However, backing up to another partition on the same drive is not what I'd recommend. If the drive dies, you may lose both partitions.
As for doing constant backups of the most used files and at night doing a system backup - it seems to me you aren't "getting" TM. This sounds like the type of backup strategy one uses with "regular" backup software. I don't think I'd recommend backups every minute, but for short intervals, why not just do a default backup of everything. It doesn't really back up everything, just things that have changed. The only time it does a complete backup is the first time you use it with a specific drive. After that it no longer does complete backups, unless you reformat the drive and start from scratch.

Restoring a time machine backup from a Mac mini to a new Mac mini server

Hi,
I just replaced a faulty Mac mini with a Mac mini server. I have a time machine backup of my Mac mini and want to transfer it over to the Mac mini. How do I do this?

This is a bit of a guess... But I Imagine you would have to start with the workstation OS install DVD first, and go from there at the appropriate point. Any chance you have or could make a CCC backup instead? I am assuming you could boot a mini server from a backup of mini non-server. Then you could copy it over. This is probably worth a phone call to Apple TAC

When I get to the select disk page it says that the HD is uesd as time machine drive. How can I remove time machine backup from my Mac.

I am tring to installe OS X Mavericks. When I get to the select disk page it says that the HD is uesd as time machine drive. How can I remove time machine backup from my Mac.

Open up your Finder and click on Go on the top menu bar. Select Computer and then double click Macintosh HD. In here delete the backup folder. Might be called backups.backupdb.

HT201250 Can I copy a time machine backup from one mac to another?

I have two Mac Book Pros that I use for work - I have one at home and one at work. I'd like to copy the contents and setup from my work Mac to my home Mac using a time machine backup, and then continue to use the time machine backup back at work. I.e. the time machine would only be used with the home Mac to copy over the contents and setup of my work Mac.
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Thanks!

Welcome to Apple Support Communities
Of course. Note that you can restore a Time Machine backup on all the Macs you want, always that the Mac uses the same or a newer OS X version than the one that had the Mac you used to make this backup.
Also, you can back up different computers to the same Time Machine drive. In this case, Time Machine will create different folders in your Time Machine drive for each computer, so one Mac backup won't conflict with the other computer backup.
To restore a backup, use Migration Assistant. Just connect the Time Machine drive, open Migration Assistant (it's in /Applications/Utilities) and follow the steps to restore the backup onto the computer

Accessing user's local Time Machine backup on client Mac?

I'm trying to configure a file server with backup for local Macs.
I've set up file sharing, users and groups in Server.app and it works as intended – after logging to the server, users see their home folders and other shared folders where they store their files.
The idea is to use Time Machine backups on the server Mac. I've enabled it on the server and used a separate hard drive. It works well, and I can enter the Time machine from the server.
Now, is it possible for users on client Macs connected to and working on the server volume to access Time Machine backups of their files?
Thanks!

Yes, I'm using OS X Mavericks Server. There's a shared volume "Design Work" where clients keep their files. It's backed up to a separate volume "Backup" via Time Machine. What I would like to do is to let clients access Time Machine backup of their files (stored on "Design Work" volume on the server) without the need to physically go to the server computer. Is that at all possible?
I've tried to follow this instruction but it doesn't seem to work. I can select the shared TM backup from a client via "browse other backup disks" option but I can't see the files on "Design Work" share, just local files.

Alum Mac Mini SLOW after restore from Time Machine backup of 09 Mac Mini

Hi,
I bought a 2010 Alum Mac Mini (2.4Ghz/2GB/320GB/OS10.6.4) a couple months ago, and I restored it from a time machine backup from my old '08 Mac Mini (1.83ghz/2GB/OS10.6.4). All data moved successfully, but this machine seems 2x slower than my old Mac Mini.
Issues I'm encountering include:
iDisk sync extremely slow
launching Apps slow
Trouble handling more than 3 or 4 open apps (Chrome, iTunes, Pages, Numbers)
Is it possible that this is an issue because of restoring from the backup?
Thanks in advance!
PS - I'm a fairly intermediate-advanced user, no programming background, but solid on most other things.

Welcome to the Apple Discussions!
If you still have the TM backup, I would suggest erasing the new Mac mini's HDD and doing a fresh install from its Install DVD and then do a migration of the TM backup rather than a clone. There is something in that clone that the new mini does not like.
You could also, as an alternative, try installing Mac OS X from the Install DVD over the top of the clone and see if it fills in the gap or corrects whatever the new mini does not like. This should not touch your data, just install Mac OS X Snow Leopard over the version already there. But you should always make a backup of anything that is not backed up.
Dah•veed

Issue trying to use old Mac Time Machine backup on new Mac

I've just got a new iMac 27" to replace my old 21" and am planning to restore files from the Time Machine backup I have. On the iMac 21" I used an external hard-drive connected to an Airport Extreme Base Station to back up using Time Machine. On the new Mac the external drive is connected directly to the USB port. The old machine is now about 10,000 miles away from me.
The issue I have is I cannot read the back-up from the old machine on the new.
During the first startup I tried to read from the Time Machine backup but the system told me I could not use it because it was from a different machine - it read all the back-up dates and let me chose, but did not allow to use it.
After startup was completed, I run a software update to make sure everything had the same version and tried Migration Assistant (with the HD still connected to the USB port), but the wheel keeps spinning not finding any disk.
I can read the .sparsebundle file on the external drive and I see it is intact. Disk Utility recognizes it and Status is Not mounted. When I try to open it with Disk Utility it says it is not mountable.
Any of you know how I can resolve this? I am thinking of a way of opening the file and reading it.
I really just need my music, my movies and my pictures, but I have 1.2T of that so it is not something I can download from the old Mac.
Thanks a lot in advance.

I've just got a new iMac 27" to replace my old 21" and am planning to restore files from the Time Machine backup I have. On the iMac 21" I used an external hard-drive connected to an Airport Extreme Base Station to back up using Time Machine. On the new Mac the external drive is connected directly to the USB port. The old machine is now about 10,000 miles away from me.
The issue I have is I cannot read the back-up from the old machine on the new.
During the first startup I tried to read from the Time Machine backup but the system told me I could not use it because it was from a different machine - it read all the back-up dates and let me chose, but did not allow to use it.
After startup was completed, I run a software update to make sure everything had the same version and tried Migration Assistant (with the HD still connected to the USB port), but the wheel keeps spinning not finding any disk.
I can read the .sparsebundle file on the external drive and I see it is intact. Disk Utility recognizes it and Status is Not mounted. When I try to open it with Disk Utility it says it is not mountable.
Any of you know how I can resolve this? I am thinking of a way of opening the file and reading it.
I really just need my music, my movies and my pictures, but I have 1.2T of that so it is not something I can download from the old Mac.
Thanks a lot in advance.

Time Machine backup on new Mac - but too big?

Hi,
I am the current owner of a Macbook and i use 160GB of my harddrive. I am contemplating on buying a Macbook Air 11" with 128GB "HD", but I am hesitant, since I don't know how the computer would handle having to start up from a Time Machine-back up made from my Macbook, that would of course be larger than the Macbook Air has capacity for.
Is it even possible?

firemandan900 wrote:
I just had to replace my 13" Macbook Pro through warranty. When I first turned it on I selected to restore the computer from my time machine backup and after several hours it finished successfully with the exception of Ilife which on the restore had to be updated before it would open the restored databases. The other issue I am having is that timemachine is no longer working. I would prefer to have timemachine backup to the existing archive structure it created on the old machine but right now it just says it can not find the volume. Is there a way to keep using the existing backup
If there's room, TM can start a new set of backups for the new Mac on the same disk or Time Capsule. But it will make a new, full backup of the new Mac, so if your TM disk/partition isn't at well over twice the size of the data it's backing-up, your best bet will be to erase the drive with Disk Utility and let TM start over.
There's a downside to that, though. TM on the new Mac won't delete the oldest backups from the old Mac when it needs room for new backups.
Instead, it will delete the oldest backups from the new Mac, leaving the old backups "stranded." Without erasing the TM disk/partition, you'll have to delete the old backups one at a time, via the TM interface, which is quite tedious and time consuming. See the instructions in item #12 of the Frequently Asked Questions post at the top of this forum.
or do I need to delate the archives and start a new archive?
That's probably your best option.

Time Machine backup created on Mac with a large hard disk. What happens when restore to MacBook Air with small SSD drive?

What if a Time Machine backup was created on a Mac with a large hard disk, e.g. 500GB iMac - and I buy a new MacBook Air with a small SSD hard disk e.g 128GB. What happens when I need to use the larger Time Machine file to set up the new MacBook Air? What happens to all those files that can't fit on the smaller SSD drive?

It is not the HD size, but rather the size of the data it contains. If you right-click your 500GB drive and select "Get Info" you can see how much is actually being used.
Naturally if you are using more space than the new drive has, then you have to make some choices about what you want to keep and what you want to keep archived.
I don't know what options are available but you may simply have to do a manual restore of files you want, in groups.

How do i install time machine backup from old mac to newer one

Hi, I know how to set up a brand new imac with full info and settings from an old mac from a time machine backup on a portable drive, BUT.... this time i have a 2011 imac in my studio already in use that we want to be completly swapped with full info and settings/software etc from an older 2009 imac, which we may sell on.
I have backup up via time machine the older 2009 mac, but when i plug this into the 2011 imac how do i completly wipe it and set up with info from the time machine?? it was easy doing it on a factoryt new mac but not this.
thanks
lee

If I have understood you properly, you want to migrate the data from the 2009 iMac onto the 2011 iMac but keeping the existing files on it.
To do this, use Migration Assistant > http://support.apple.com/kb/HT4889 It will create a new user with the transferred files from the old iMac.
If you want to wipe the 2011 iMac and restore everything from the 2009 iMac, the most reliable way is erasing the hard drive, reinstalling OS X and restoring the backup. If you are using the same OS X version on both iMacs, you can restore the Time Machine backup without having to reinstall OS X, just starting from the Mac OS X DVD (or Recovery HD, if you have OS X Lion or Mountain Lion)

Which disk did Time machine backup if running Mac OSX 10.6.8 on an external startup disk?

The original hard drive on my 2007 iMac was pretty full, so I was using an external hard drive as the startup disk while I got around to replacing the original hard drive. I could still see the original hard drive and its contents and it still had a bootable copy of OSX 10.6.8 on it, but I was starting up from the external drive running OSX 10.6.8. I recently attached another external drive and backed up with Time Machine. Now the original internal hard drive has crashed. I can no longer see it to even try to repair it. My question is, was that internal hard drive backed up with the Time Machine backup, or was only the external startup disk backed up? If the internal one was backed up, how can I retore it's contents to another drive? - Thanks

Sorry to hear.
Other possibilities...
Data Rescue...
http://www.prosofteng.com/products/data_rescue.php
(Has a Free Demo to see if it could or not, but you'll need another drive to recover to).
rccharles on file recovery...
"Stellar Phoenix Macintosh - Mac data recovery software, recovers data from damaged, deleted, or corrupted volumes and even from initialized disks."
They have a trial version, so I guess you can see if your data can be recovered...
http://www.stellarinfo.com/mac-data-recovery.htm
FileSalvage is an extremely powerful Macintosh application for exploring and recovering deleted files from a drive or volume. FileSalvage is designed to restore files that have:
    * been accidentally deleted.
    * become unreadable due to media faults.
    * been stored on a drive before it was re-initialized/formatted.
http://subrosasoft.com/OSXSoftware/index.php?main_page=product_info&products_id= 1

Time machine backup between OSX versions?

Hi,
I have a 2006 Mac Pro with OSX10.7 installed, I decided to upgrade as the newest versions of OSX aren't supported. My question is could I restore my OSX 10.7 time machine backup to OSX 10.8? Or would it change the OSX version to 10.7 on the new machine? If so is there anyway to restore the time machine backup without losing OSX 10.8 or having to buy and reinstall it?
Thanks, Tom

Once you have bought a version of Mac OS X, you may re-download and re-Install it as often as you like without paying again -- provided you use the same Apple-ID to do so.
A 2006 Mac Pro cannot run 10.8, so I do not understand the rest of your query. That Mac is stuck at 10.7 as the highest it can run. If you attempt to download 10.8 to it, it should refuse to do so, offering instead the highest purchased version that can actually run on that machine.

Sharing a Time Machine backup between two Macs

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