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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 External hard drive (optional): You need to back up your data to save your important files before installing the new macOS.Make sure the installer is fully downloaded (about 5 GB)
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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.
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MacKeeper allows you to free up necessary gigabytes easily.
You can now quit Terminal and eject the volume.Please note that before installing any system, you need to ensure there is sufficient space on your Mac.
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