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Apple Computing Products:
macOS - Operating System
Reinstalling/fixing corrupted OS
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<blockquote data-quote="Rod" data-source="post: 1830956" data-attributes="member: 204485"><p>I'm puzzled, how did you manage to install an Operating System (OS) on the External Hard Drive (EHD)? </p><p></p><p>Currently I take it you are running off the EHD, that is, the OS in on the EHD and all your files are on the Internal Drive (SSD)?</p><p></p><p>My suggestion would be to copy all of your files and applications to the EHD. Most of these files will be in the Macintosh HD Folder which you should see in the side menu of any Finder window. If not check Finder Menu preferences and click Sidebar and tick everything, the "your name's" MacintoshHD is the one you want.</p><p>In that you will find Applications, Library, System and Users folders. You can just drag and drop these folders onto your EHD. Of course they will take a while to copy. Don't try to do more that one folder at a time.</p><p></p><p>The objective of that exercise is to have backups of all your personal data on the EHD so you can work on the internal SSD.</p><p></p><p>Once you have, say the contents of your Photos Folder, onto the EHD you can delete it from your SSD.</p><p></p><p>This will give you enough space to download the installer for macOS Sierra 10.12.6. Quit it once it loads (it will try to begin installation) just go to the Installer Menu on the menu bar and Quit it. Now you can copy it to the EHD. That way you will retain a copy in case the process goes sideways. The original on the SSD will be erased automatically when you use it. </p><p></p><p>I suggest then you run the installer on the internal SSD and select the erase and instal option.</p><p></p><p>Now you will have an empty SSD except for the macOS.</p><p></p><p>If all seems well you can reverse the process of transferring the data from the EHD to the internal SSD.</p><p></p><p>All of this probably sounds very complicated but step by step you will get there. There really is no simpler way. Most of the time will be waiting for data to transfer.</p><p></p><p>Make sure you have all of your passwords for everything.</p></blockquote><p></p>
[QUOTE="Rod, post: 1830956, member: 204485"] I'm puzzled, how did you manage to install an Operating System (OS) on the External Hard Drive (EHD)? Currently I take it you are running off the EHD, that is, the OS in on the EHD and all your files are on the Internal Drive (SSD)? My suggestion would be to copy all of your files and applications to the EHD. Most of these files will be in the Macintosh HD Folder which you should see in the side menu of any Finder window. If not check Finder Menu preferences and click Sidebar and tick everything, the "your name's" MacintoshHD is the one you want. In that you will find Applications, Library, System and Users folders. You can just drag and drop these folders onto your EHD. Of course they will take a while to copy. Don't try to do more that one folder at a time. The objective of that exercise is to have backups of all your personal data on the EHD so you can work on the internal SSD. Once you have, say the contents of your Photos Folder, onto the EHD you can delete it from your SSD. This will give you enough space to download the installer for macOS Sierra 10.12.6. Quit it once it loads (it will try to begin installation) just go to the Installer Menu on the menu bar and Quit it. Now you can copy it to the EHD. That way you will retain a copy in case the process goes sideways. The original on the SSD will be erased automatically when you use it. I suggest then you run the installer on the internal SSD and select the erase and instal option. Now you will have an empty SSD except for the macOS. If all seems well you can reverse the process of transferring the data from the EHD to the internal SSD. All of this probably sounds very complicated but step by step you will get there. There really is no simpler way. Most of the time will be waiting for data to transfer. Make sure you have all of your passwords for everything. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Reinstalling/fixing corrupted OS
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