How to create a bootable macOS High Sierra installer drive Put the macOS High Sierra installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac. Jan 20, 2018 I have an Apple MacBook Air 13.3in with 128 GB SSD. I have yet to move from Sierra to High Sierra OS, thankfully, as seems to be some problems. I back some stuff to the iCloud but decided to get external hard drive too and was about to plump for a. Best external hard drive for mac. How to Use macOS High Sierra with the Bootable Hard Drive As you now have macOS High Sierra in the form of bootable hard drive, you can use it with another compatible Mac or when the situation demands. However, remember that using the external device as a bootable drive will slow down the functioning of the system.
Apple offers the Fusion Drive as build-to-order options for the $799 Mac mini and the upcoming iMac, but if you are willing, able, and have the parts, you can make your own Fusion Drive. Sep 27, 2017 Also, macOS 10.13 High Sierra won’t convert a dual-SSD Fusion Drive, with one on internal PCIe bus (Mac Pro) and the other one in a Thunderbolt enclosure (drive recognized as SSD and trim enabled). So does not seem related to hard drive here. Apple offers the Fusion Drive as build-to-order options for the $799 Mac mini and the upcoming iMac, but if you are willing, able, and have the parts, you can make your own Fusion Drive.
- High Sierra For Fusion Drive Macs 2017
- Fusion Drive Review
- Upgrade To Mac High Sierra
- High Sierra For Fusion Drive Macs Free
In an undated advisory note to those who took part in the High Sierra beta-testing programme, Apple has warned that it will not support the use of APFS on Fusion Drives in the initial release version of High Sierra. That note recommends that anyone who converted their Fusion Drive to APFS during the the beta programme should format that drive in HFS+ before they install the release version of High Sierra.
High Sierra For Fusion Drive Macs 2017
That note also reveals that:
Fusion Drive Review
- Apple intends that a future version of High Sierra will support APFS on Fusion Drives. It makes no comment about support, present or future, for conventional spinning hard drives.
- High Sierra will be released from the App Store in an app named High Sierra Install Assistant, probably instead of a normal macOS Installer app. When run, that app creates and mounts a volume named InstallAssistant containing the Install macOS High Sierra app.
- The version of APFS in High Sierra release differs from that/those in beta releases.
- A bootable installer for High Sierra requires a minimum of 10 GB storage. Previously 12 GB was specified.
In the preamble to that note, Apple states that, because APFS on a Fusion Drive “is not supported in the initial release of macOS High Sierra, we recommend that you follow the steps below to revert back to the previous disk format.”
As High Sierra doesn’t offer any non-destructive method for reverting a volume in APFS back to HFS+, that note next describes two methods for formatting a startup Fusion Drive as HFS+, before installing High Sierra and restoring the volume from a Time Machine backup.
The first reveals that Apple will be releasing High Sierra from the App Store in the form of an app named High Sierra Install Assistant, which can be used to create an external bootable installer (a process which I will document separately) or to install High Sierra. It is likely that this will replace simpler macOS installer apps of previous upgrades.
At present, the second method appears incomplete. Step 3 states:
On a Mac running 10.12.5 or later, use the Terminal app to run the following command:
Adobe acrobat mac os. then fails to give the command before moving on to step 4.
Upgrade To Mac High Sierra
Anyone tempted to format their Fusion Drive in APFS then install the release version of High Sierra on it should think again. It is most probable that Apple has deemed this combination to be unsupported because of continuing problems in this first release version of APFS, not because of problems in converting Fusion Drives from HFS+ to APFS. ‘Unsupported’ could mean that you risk not only losing your data, but possibly even damaging the Fusion Drive.
High Sierra For Fusion Drive Macs Free
(Thanks to Garry for kindly providing the link.)