Plugin the USB flash drive or other volume that you're using for the bootable installer. Open Terminal, which is in the Utilities folder of your Applications folder. Type or paste one of the commands below into Terminal, then press Return to enter the command. Each command assumes that the installer is in your Applications folder, and MyVolume Thebest way to download Mac OS X High Sierra is via a direct link download. This is primarily because Apple has hidden the installer from the Mac App Store. This means that users that search for the installer will not find anything if they have a newer version of Mac OS. Users can download the app via a direct link and then install it that way. Ihave a mid-2011 iMac with 16gb of RAM and an SSD drive installed. Currently I'm using macOS High Sierra (version 10.13.6) which is the last supported version on my Mac. Is there any way to force the installation of a newer version of macOS, Catalina for example? If the answer is yes, how it can damage my mac? DoNOT upgrade until you have made a Time Machine or other backup of your startup drive.. To be clear, software update generally means to install software to update the macOS currently running on the Mac; update Catalina 10.15.1 to Catalina 10.15.7, for example.. A software upgrade is usually a generational step up to a newer macOS; upgrade from 10.13 High Sierra to 10.14 Mojave, for example Thefirst, and most important thing you should do before upgrading to macOS Big Sur (or updating any software, no matter how small), is to back up your Mac. How to back up your Mac. Next, it is not a bad idea to think about partitioning your Mac so you can install macOS Big Sur in tandem with your current Mac operating system. Followthe steps below to download macOS High Sierra: Step 1. Open the downloads center for macOS. Step 2. In the search bar, type in macOS High Sierra and select the wanted version of macOS High Sierra. Step 3. Click the "Download" button to download the macOS High Sierra installer. U6aVJu.

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