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I really wish there was a way to "force" folks to read and understand backups. The critical task of backing up one's "stuff" keeps coming up over and over again. So many times folks come here looking for solutions to issues, but they either do not have a backup, or else they rely on Time Machine for that task. Time Machine is fine for what it does, but it still leaves a lot to be desired. For what it's worth (and hopefully to help folks out), I'm going to describe backups strategies, along with other associated tasks.
First, there are two ways of backing up: one is to use Time Machine, which comes as part of the Mac OS. The other is to use a backup/cloning product, either SuperDuper! or Carbon Copy Cloner. There are, of course, advantages and disadvantages of each:
1. Time Machine - Advantages: a) Free b) Easy to schedule frequent backups
Disadvantages: a) Not Bootable b) not as easy to use for recovery
2. SuperDuper! or Carbon Copy Cloner - Advantages: a) each make a bootable backup/clone b) Makes recovery much easier and smoother
Disadvantages: a) not free (although each of them can be used in demo mode) b) not as "easy" to schedule frequent backups (somewhat more "manual" than Time Machine)
Secondly, as most folks know, I use SuperDuper!, and to be totally honest, I would not be without it. Also, I have never used Time Machine. The primary reason is that I require a "bootable" way to recover from a disaster. While getting to a Time Machine backup can be achieved by booting to the (hidden) Recovery HD partition (and also performing disk maintenance/repairs (albeit, via Disk Utility)), the process is slow, and if one wants to do a re-installation of the Mac OS via that partition, that process is even slower, as it depends upon 1) availability of Apple's servers, and 2) speed of one's internet connection. Those two drawbacks alone are why I much prefer SuperDuper! (Carbon Copy Cloner would also be an excellent choice).
Third, before I go on, it would be good to mention the differences between SuperDuper! and Carbon Copy Cloner. First is cost: SuperDuper! costs $27.95, whereas Carbon Copy Cloner costs $39.95. From what I understand, the primary reason for that is that Carbon Copy Cloner also backs up the (hidden) Recovery HD partition, whereas SuperDuper! does not. I have never needed that partition (I'll explain below). Secondly, as mentioned, Carbon Copy Cloner also backs up the Recovery HD partition. However, Shirt Pocket software (the company that makes SuperDuper!) is currently beta testing a new version of SuperDuper!, and besides compatibility with High Sierra, it will back up that (hidden) Recovery HD partition.
Next, in quite a number of posts by folks, it is either necessary or desirable to "revert back" to a prior OS. Here are the ways to do that with these backups methods:
1. Time Machine - After booting to the (hidden) Recovery HD partition, use Disk Utility to 1) perform first aid on one's internal drive, 2) use Disk Utility to Erase and Format the drive, 3) select re-install mac OS for a fresh, clean installation of the mac OS, and 4) use Migration Assistant to "migrate"/copy needed "stuff" from the Time Machine backup. The disadvantages of this are 1) booting to the Recovery HD partition is a slow process, and 2) for the mac OS installation, I have always been unclear as to which Mac OS one will get, along with it being a slow process, as it is performed via the internet, along with the availability of Apple's servers.
2. SuperDuper! or Carbon Copy Cloner - First, make sure you have the latest version of the prior OS (or maybe for some folks like myself (at present), the current OS, which for me is Sierra, V 10.12.6.). If one does not have it, re-download it from the App Store. The resulting file, entitled "Install macOs Sierra", will reside in the Applications folder. Make a copy of it in another location on one's drive. This step is so, so important, as it makes recovery so much easier. Myself, within the /System/Documents folder, I have two folders, one entitled "Useful Software" (it's where I keep the original installation files for each of my third-party applications), and the other entitled "Upgrades", which is where I keep "OS-related" upgrades. I have some sub-folders there, and it is the place where copy that copy of the "Install macOS Sierra" (or whatever applicable Mac OS) file. Secondly, if necessary, I make one more SuperDuper! backup (actually 2 of them) to each of my external drives. Besides my normal once a week maintenance/backup tasks, I would also do that right before I upgrade to a new Mac OS (like High Sierra, but not yet). Third, re-start my Mac from that bootable backup. The beauty of that is that it is just like having another machine. Next, I use Disk Utility there to do the two tasks mentioned above for Time Machine. Once the Erase/Format process is complete, I then find the "Install macOS "whatever OS"" file ("Install macOS Sierra", in my case), launch it, and perform the clean, fresh, "virgin" installation of that Mac OS. Finally, just like above, after the Mac OS installation completes, use Migration Assistant to "migrate"/copy needed "stuff from my most recent SuperDuper! backup.
It should be clear why I so much prefer using SuperDuper! (again, the process would be the same with Carbon Copy Cloner), but I'll list them here:
1. Everything is done "locally", ie, it is not dependent on the internet, along with me having much more control.
2. Re-starting my Mac from a SuperDuper! backup is MUCH faster than via the (hidden) Recover HD partition.
3. I know what exact Mac OS I'll be re-installing, and again, it is a "local" process.
4. Besides Disk Utility, I have access to other useful Mac apps, and in particular, Tech Tool Pro, an excellent disk cleanup/maintenance/repair program. For these reasons, that is why I really do not need the Recovery HD partition (along, of course, with having the applicable "Install macOS "whatever"" file).
4. It is faster and smoother.
OK, that should do it. I do apologize for the long post, but given how many times I have seen issues with backups/recovery, I felt it was needed.
I of course welcome any comments, suggestions, corrections, etc.
First, there are two ways of backing up: one is to use Time Machine, which comes as part of the Mac OS. The other is to use a backup/cloning product, either SuperDuper! or Carbon Copy Cloner. There are, of course, advantages and disadvantages of each:
1. Time Machine - Advantages: a) Free b) Easy to schedule frequent backups
Disadvantages: a) Not Bootable b) not as easy to use for recovery
2. SuperDuper! or Carbon Copy Cloner - Advantages: a) each make a bootable backup/clone b) Makes recovery much easier and smoother
Disadvantages: a) not free (although each of them can be used in demo mode) b) not as "easy" to schedule frequent backups (somewhat more "manual" than Time Machine)
Secondly, as most folks know, I use SuperDuper!, and to be totally honest, I would not be without it. Also, I have never used Time Machine. The primary reason is that I require a "bootable" way to recover from a disaster. While getting to a Time Machine backup can be achieved by booting to the (hidden) Recovery HD partition (and also performing disk maintenance/repairs (albeit, via Disk Utility)), the process is slow, and if one wants to do a re-installation of the Mac OS via that partition, that process is even slower, as it depends upon 1) availability of Apple's servers, and 2) speed of one's internet connection. Those two drawbacks alone are why I much prefer SuperDuper! (Carbon Copy Cloner would also be an excellent choice).
Third, before I go on, it would be good to mention the differences between SuperDuper! and Carbon Copy Cloner. First is cost: SuperDuper! costs $27.95, whereas Carbon Copy Cloner costs $39.95. From what I understand, the primary reason for that is that Carbon Copy Cloner also backs up the (hidden) Recovery HD partition, whereas SuperDuper! does not. I have never needed that partition (I'll explain below). Secondly, as mentioned, Carbon Copy Cloner also backs up the Recovery HD partition. However, Shirt Pocket software (the company that makes SuperDuper!) is currently beta testing a new version of SuperDuper!, and besides compatibility with High Sierra, it will back up that (hidden) Recovery HD partition.
Next, in quite a number of posts by folks, it is either necessary or desirable to "revert back" to a prior OS. Here are the ways to do that with these backups methods:
1. Time Machine - After booting to the (hidden) Recovery HD partition, use Disk Utility to 1) perform first aid on one's internal drive, 2) use Disk Utility to Erase and Format the drive, 3) select re-install mac OS for a fresh, clean installation of the mac OS, and 4) use Migration Assistant to "migrate"/copy needed "stuff" from the Time Machine backup. The disadvantages of this are 1) booting to the Recovery HD partition is a slow process, and 2) for the mac OS installation, I have always been unclear as to which Mac OS one will get, along with it being a slow process, as it is performed via the internet, along with the availability of Apple's servers.
2. SuperDuper! or Carbon Copy Cloner - First, make sure you have the latest version of the prior OS (or maybe for some folks like myself (at present), the current OS, which for me is Sierra, V 10.12.6.). If one does not have it, re-download it from the App Store. The resulting file, entitled "Install macOs Sierra", will reside in the Applications folder. Make a copy of it in another location on one's drive. This step is so, so important, as it makes recovery so much easier. Myself, within the /System/Documents folder, I have two folders, one entitled "Useful Software" (it's where I keep the original installation files for each of my third-party applications), and the other entitled "Upgrades", which is where I keep "OS-related" upgrades. I have some sub-folders there, and it is the place where copy that copy of the "Install macOS Sierra" (or whatever applicable Mac OS) file. Secondly, if necessary, I make one more SuperDuper! backup (actually 2 of them) to each of my external drives. Besides my normal once a week maintenance/backup tasks, I would also do that right before I upgrade to a new Mac OS (like High Sierra, but not yet). Third, re-start my Mac from that bootable backup. The beauty of that is that it is just like having another machine. Next, I use Disk Utility there to do the two tasks mentioned above for Time Machine. Once the Erase/Format process is complete, I then find the "Install macOS "whatever OS"" file ("Install macOS Sierra", in my case), launch it, and perform the clean, fresh, "virgin" installation of that Mac OS. Finally, just like above, after the Mac OS installation completes, use Migration Assistant to "migrate"/copy needed "stuff from my most recent SuperDuper! backup.
It should be clear why I so much prefer using SuperDuper! (again, the process would be the same with Carbon Copy Cloner), but I'll list them here:
1. Everything is done "locally", ie, it is not dependent on the internet, along with me having much more control.
2. Re-starting my Mac from a SuperDuper! backup is MUCH faster than via the (hidden) Recover HD partition.
3. I know what exact Mac OS I'll be re-installing, and again, it is a "local" process.
4. Besides Disk Utility, I have access to other useful Mac apps, and in particular, Tech Tool Pro, an excellent disk cleanup/maintenance/repair program. For these reasons, that is why I really do not need the Recovery HD partition (along, of course, with having the applicable "Install macOS "whatever"" file).
4. It is faster and smoother.
OK, that should do it. I do apologize for the long post, but given how many times I have seen issues with backups/recovery, I felt it was needed.
I of course welcome any comments, suggestions, corrections, etc.
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