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Article ID = 180
Article Title = macOS 10.13 High Sierra Frequently Asked Questions FAQ
Article Author(s) = Graham Needham (BH)
Article Created On = 16th May 2017
Article Last Updated = 29th January 2021
Article URL = https://www.macstrategy.com/article.php?180
Article Brief Description:
Frequently Asked Questions about macOS 10.13 High Sierra

WARNINGS!

Safari 13 for High Sierra does not support .safariextz packaged Safari Extensions - see our High Sierra Third Party Product Compatibility Information article
Safari 13 for High Sierra does not support legacy NPAPI browser plug-ins except for Adobe Flash

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macOS 10.13 High Sierra Frequently Asked Questions

Q. When was macOS 10.13 High Sierra released?

A. High Sierra was released on the 25th September 2017. It is still available to download from Apple - do not download installers from anywhere else!

Q. How much does macOS 10.13 High Sierra cost?

A. It is a FREE download via the Mac App Store

Q. In our family/household/business the different Macs have different iTunes / App Store accounts onthem. Do I have to download High Sierra multiple times?

A. No. You can have more than one iTunes / App Store authorisation on a single machine. Use one ofthe iTunes / App Store accounts to authorise each computer in the family/household/business in turn todownload and install High Sierra (in the App Store application click on the 'Purchases' tab).
NOTE: Rosetta High Sierra

Mac App Store authorisations (for consumers) are different to iTunes authorisations. Mac App Store authorisations are unlimited whereas the iTunes authorisation limit is 10.

Q. How do I install High Sierra on multiple computers?

A. There are multiple reports of some people getting a ~20MB stub rather than the normal, full ~5GB installer. With much testing and feedback we were never able to determine exactly why some people got the full installer and some people got the stub. We ruled out:

Mac model / age
Version of macOS / OS X currently installed
Having ever been on the developer / public beta stream
Core Storage or not
SSD or spinning hard disk
Available free space on download volume
Whether you have the correct Recovery partition for the OS version you are using to download
The Mac being in your Apple ID Device List while booted from the listed OS i.e. the Mac is associated with your Apple ID
Speed of internet connection
Local network 'content caching' or 'Software Update' server

If you get the ~20MB stub there currently appears to be no way to make a copy/archive of the full installer. With the stub, once you go through the options, including where you want to install macOSHigh Sierra, it downloads a set of files to a folder called 'macOS Install Data' on the target volume instead. You cannot copy/archive these for use on another Mac in the usual way. If you selectedyour boot drive to upgrade, this folder is hidden. If you are okay with this and just want to install on one computer go ahead. If you want the full installer for multiple Mac installation,archiving purposes, obtaining the macOS Disc Image, creating an External Installation Device or creating anEmergency Boot Drive for macOS we highly recommend you download and use the macOS High Sierra Patcher utility (Donationware) which has afeature to force download the full installer.
One you have obtained or if you get the full installer in the first place you can do one of the following:

Try to download Sierra individually on each computer at ~5GB in size each time - but there is no guarantee each and every computer you have will download the full installer.
Download the Sierra installer on one computer (at ~5GB in size), quit the installer and copy the installer to each computer's Applications folder that you want to install Sierra on.
Download the Sierra installer on one computer (at ~5GB in size) and create an external installation device to boot and use on each computer that you want to install Sierra on.

Q. Which Macs can I install High Sierra on?

A. Apple has officially confirmed that the same Macs that supported macOS 10.12 Sierra are compatible with macOS 10.13 High Sierra:

MacBook (Late 2009 or newer)
MacBook Pro 13' (Mid 2010 or newer)
MacBook Pro 15' (Mid 2010 or newer)
MacBook Pro 17' (Mid 2010 or newer)
MacBook Air (Late 2010 or newer)
Mac mini (Mid 2010 or newer)
iMac (Late 2009 or newer)
Mac Pro (Mid 2010 or newer)

NOTE: You will also need at least OS X 10.8.5 and an Apple ID to be able to obtain High Sierra from the Mac App Store.

Q. How can I check what specifications my computer has or graphics capability it has?

Q. Which Mac do I have?

A. You can check 'Processor', 'Memory' and macOS/OS X/Mac OS X 'Version' by going to Apple menu > About This Mac > Overview tab if necessary (hint - clicking on the version number will give you the 'build' number).
A. To check your Mac's 'Model Name' go to Apple menu > About This Mac > Overview tab if necessary > check for the computer name in the top line e.g. 'MacBook Pro' (this can only be checked with OS X 10.7 or later)
A. To check your Mac's model date version go to Apple menu > About This Mac > Overview tab if necessary > check the details after the Model Name e.g. 'Early 2015' (this can only be checked with OS X 10.7 or later) - to be more specific and exact you can check what 'Model Identifier' your Mac has by:

If you are running Mac OS X 10.6 or earlier go to Apple menu > About This Mac > click the 'More Info…' button > (the System Profiler application will open) select 'Hardware' in the top left > check what it says for 'Model Identifier' on the right.
If you are running OS X 10.7 or OS X 10.8 go to Apple menu > About This Mac > click the 'More Info…' button > (the System Information application will open) select 'Hardware' in the top left > check what it says for 'Model Identifier' on the right under 'Hardware Overview'.
If you are running OS X 10.9 or later go to Apple menu > About This Mac > click the 'Overview' tab in the top left > click the 'System Report…' button > (the System Information application will open) select 'Hardware' in the top left > check what it says for 'Model Identifier' on the right under 'Hardware Overview'.

A. To check what graphics capability your Mac has:

If you are running Mac OS X 10.6 or earlier go to Apple menu > About This Mac > click the 'More Info…' button > (the System Profiler application will open) select 'Graphics/Displays' under 'Hardware' in the top left (click the triangle down if necessary) > click on the 'Video Card' on the right to see the technical information below.
If you are running OS X 10.7 or OS X 10.8 go to Apple menu > About This Mac > click the 'More Info…' button > (the System Information application will open) select 'Graphics/Displays' under 'Hardware' in the top left (click the triangle down if necessary) > click on the 'Video Card' on the right to see the technical information below.
If you are running OS X 10.9 or later go to Apple menu > About This Mac > click the 'Overview' tab in the top left > click the 'System Report…' button > (the System Information application will open) select 'Graphics/Displays' under 'Hardware' in the top left (click the triangle down if necessary) > click on the 'Video Card' on the right to see the technical information below. With OS X 10.11 or later here you will also find whether your GPU supports 'Metal'.

A. To check your Mac's 'Model Number' it is usually printed/engraved on the outside of the computer somewhere (it usually begins with the letter A or M).

Q. My Mac has the correct type of processor but I don't have enough RAM. What can I do?

A. All the supported Macs can run at least 2GB of RAM so all you need to do is make sure your computer has at least 2GB RAM instal