Check compatibility
Jun 16, 2020 Mac mini introduced in 2012 or later iMac introduced in 2012 or later iMac Pro (all models) Mac Pro introduced in 2013 or later. To upgrade from Lion or Mountain Lion, first upgrade to El Capitan, then upgrade to Catalina. To find your macOS version, Mac model, memory, and storage space, choose About This Mac from the Apple menu. Here's how I initially got my Early 2009 Mac Pro to take 10.2 Sierra: EFI and Firmware update from 4,1 to 5,1 for Sierra Upgrade Solved. I have had no issues with this installation for the last year. I just booted this same machine from a High Sierra install on an external drive and it is what I'm using at this moment with no apparent issues. Sep 25, 2017 If you own a MicroBook Iic, be sure to install the latest MicroBook IIc firmware update here for 100% USB audio class compliant compatibility with High Sierra. MOTU pro audio interfaces If you own one of the pro audio models listed below, be sure to download and install the very latest shipping drivers. Apr 26, 2018 Try using the Combo Update to install the macOS High Sierra 10.13.4 update. It’s unlikely a font file would be preventing a system update, but if you’re concerned about that you could always move the font file out of the system folder and install the update, then put it back afterwards. Don’t delete it though, you might need it.
You can upgrade to macOS High Sierra from OS X Mountain Lion or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 14.3GB of available storage space.
MacBook introduced in late 2009 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS High Sierra, the installer will let you know.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS High Sierra
![For For](/uploads/1/2/6/5/126558666/810990119.jpg)
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system.
If you still need macOS High Sierra, use this App Store link: Get macOS High Sierra.
Begin installation
After downloading, the installer opens automatically.
![Sierra Sierra](/uploads/1/2/6/5/126558666/219885958.jpg)
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
Allow installation to complete
Mac Pro 5 1 Firmware
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.
Mac Pro 4.1 Firmware Update High Sierra
Learn more
- If you have hardware or software that isn't compatible with High Sierra, you might be able to install an earlier macOS, such as Sierra or El Capitan.
- macOS High Sierra won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.