Before looking for an ISO, ensure your hardware is compatible. High Sierra supports the following Mac models: : Late 2009 or newer MacBook Pro : Mid 2010 or newer MacBook Air : Late 2010 or newer Mac mini : Mid 2010 or newer iMac : Late 2009 or newer Mac Pro : Mid 2010 or newer Minimum Specs : Memory : 2 GB RAM (8 GB recommended). Storage : 14.3 GB of available disk space for the upgrade. How to Get a macOS High Sierra 10.13.5 ISO
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