To install 10.13.6, your Mac must meet these minimum hardware specifications :
for enhanced GPU performance and added support for High Efficiency Video Coding ( Apple Support Community Is High Sierra Still Usable? While officially reaching its End of Life (EoL) Macos High Sierra 10.13.6 Dmg
Even if your Mac is listed, it may require a firmware update before installing High Sierra. The installer typically handles this automatically. To install 10
Approximately 14.3GB of available disk space for the upgrade . Compatible Models: MacBook: Late 2009 or newer . To install 10.13.6
Obtaining older installers can be tricky. Apple often hides these links or directs you to the App Store, which might attempt to download a newer, incompatible OS. Here are the legitimate ways to acquire the file.