Ok so open your Applications folder and check again for anything that could be related to the High Sierra installer,įor instance Install macOS High Sierra.app or anything High Sierra related. How to create a bootable installer for macOS – Apple Support Have the Install macOS High Sierra.app in your Applications folder, and a 16GB USB stick named MyVolume, then follow the instructions here on how to create the bootable USB installer. It is also possible to make a bootable USB stick with the High Sierra installer on it. It is a good idea to keep a copy safe on an external drive should you ever need to reinstall macOS High Sierra (saves having to go through the painful download process or having to access the unreliable Apple Recovery Servers) or want to install it on another mac you have. When the download has completed and you have confirmed it is 5.23GBs in size then please make a copy of it for safe keeping, As I say the one in the Applications folder will self delete after you complete the installation. And also make sure the iMac is connected to your router via cable and not WiFi. Restart your mac and go back to the App Store and try the download again, make sure the App Store says 'Get'. Ok on your iMac you have macOS High Sierra.appdownload, as you can see it is only 415kbs, move it to the Trash and empty the Trash. If you have downloaded it to your laptop and installed it the Install macOS High Sierra.app self deletes after installing, whereas you could have just made a copy prior to installing so that you could move it over to your iMac. Incidentally, you can still find the macOS software on the Mac App Store.Wish you had told me you were trying to install macOS High Sierra on two different macs. One of the benefits of this is that your Mac can be set to automatically download the latest updates and install them, keeping your Mac up-to-date with minimum effort on your part. Now operating system updates come in via Software Updates which is either located in System Settings > General > Software Update or in System Preferences > Software Update (pre-Ventura). However, that changed with Mojave, which arrived in 2018. Since the arrival of the Mac App Store in 2011 (as an update to Snow Leopard) versions of Mac OS X and macOS have been available to download via the Mac App Store. Very old versions of Mac OS X came on a disk and any security updates came via Software Update. If you want to update your Mac to a newer version of macOS the method will be determined by the version of macOS you are running. It’s easy to find out which version of macOS is running on a Mac.įoundry How to install the latest version of macOS If you want to install the latest beta of macOS read about joining Apple’s beta program. You can install a beta version of Sonoma and test new features that haven’t yet launched. We have a full list of which Macs run which versions of macOS here.
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