

Back up your dataīefore backing up your data it’s always a good idea to clean your Mac first. Patience: Obviously, this process will take some time so you need to make sure you have an hour or two to spareĪfter making sure everything is ready, it’s time to prepare your Mac for the installation.

For this reason, you need an external HD that is at least the same size as your Mac’s internal memory
GET MACOS HIGH SIERRA INSTALL
It makes sense to create a bootable USB flash drive to install the High Sierra operating system if you want to quickly install it on several Macs without having to download the installer each time. The app will help you delete junk, duplicates, and unnecessary apps in a couple of clicks.

MacKeeper allows you to free up necessary gigabytes easily. Please note that before installing any system, you need to ensure there is sufficient space on your Mac.
