"You'll want to create a new user account thats different than your current one."ĭoes the above statement mean I have to perforce create a new user account no matter what OS and could this also lead to mismatch between the HDD & SSD? Apologies if its a dumb question, but just want to be aware.Īlso thanks for the link to the SATA-USB adapter cable.I actually had that on my Amazon shopping cart, but wasn't sure it was the right approach!! I did more research after my question & maybe I could bump it up to a 2.5/3.5 enclosure so the HDD could be protected/prevent dust collection.Īlso if anyone can comment on the RAM & SSD that I had linked to. The below instructions will guide you to modify the hosts file as required. To do this, you need to edit the hosts file on Mac to point the root domain of the download URLs () to localhost (127.0.0.1). new OS)? Even my TM backups are from 10.13.1. Step 2: Configure your Mac so that MAS looks for the macOS packages locally instead of from the Apple server. But this brings another question: the MBP (current HDD) is on High Sierra, so if I install Sierra on the SSD, this will probably lead to a conflict (old vs. Guess I'll have to create another one with Sierra to avoid the APFS problems. I have a High Sierra USB bootable installer. maybe someone else can shine some light.Thanks Dan. This really seems like a weird specific case when we re-create broken fusion drives? Hmmm. Once you’ve deleted this, go back to the main menu and hit install. Proceed by erasing your hard drive from Disk Utility. Your Mac will begin copying the installation files from the flash drive. But there are some ways to install the new OS on older devices. With the device powered off, disconnect any external hard drives and flash. Apple's latest desktop software, macOS Sierra, is only officially supported on Macs from late-2009 and up. It will open the Startup Manager so you can start the clean install. How to Install macOS High Sierra Step 1 How to Install macOS High Sierra. To continue, restart your Mac while pressing the Option Key. Side-note, when I first created the Fusion Drive, I saw no recovery partition, so I'm not so sure if it would work without doing the steps you mentioned. Take your bootable USB and connect it to your Mac. So awesome! Thanks for taking the time to detail this, people like you rock! I was feeling hopeless - then I stumbled upon this page via Google search. I realized I split up the Fusion Drive! So I rebuilt the fusion drive via the terminal, and attempted to re-install High Sierra.įailure after Failure. Well, I formatted the drives and killed the partitions, and lo' and behold, I had two drives. We had a user accidentally update to Catalina - which as you might know, partitions the physical hard drive into a system partition and user partition (for read/write security on core system files, presumably) and also kills all 32-bit apps, as they are officially unsupported on Catalina and up. Restore the machine from a Time Machine backup (NOT a fresh install).See here for details, and also see some background theory. The files are now located in /macOS\ Install\ Data. Run installer, which downloads installer files, stop installer when it asks to restart. For example if the HDD is " disk1", the large partition is probably something like " disk1s2". Use the App store (recommended) Download 'Install macOS High Sierra.app' from App Store. EXCEPT, in order to preserve the recovery partition on the new setup, do not choose the entire HDD for the Fusion terminal commands, just the large partition of it for storing data.Re-create the Fusion drive using these instructions from Apple.Everything should be like a typical system, except the parts of the Fusion drive will appear as two separate disks. Boot the computer as normal and do the basic setup steps as per any new Mac.Perform a fresh macOS install onto the HDD (not SSD) so that it stays as an jhsf+ (macOS extended journaled) volume.Split up / sever the Fusion drive by following this guide from Macworld.Boot up from the drive by starting the computer and holding down the option key.It is reported to work on theses unsupported machines: Requirements: - Early-2008 or newer Mac Pro, iMac, or MacBook Pro (MacPro 3,1 and 4,1, iMac 8,1 and 9,1. I used this link to download High Sierra from the App Store, then these instructions from Apple to make a bootable drive. Mac Mini (2010 and later) Mac Pro (2010 and later) Heres the patch tool by dosdude for High Sierra, Iused his former patch to do the Sierra upgrade.
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