Websites using terms like "Extra Quality," "Full Crack," or "Highly Compressed" are typically not authorized by Apple and carry significant risks:
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For versions like OS X Lion (10.7) or Mountain Lion (10.8), Apple once offered InstallMacOSX.dmg via purchase links. Today, you can still get older installers from Apple’s official support pages if you previously “purchased” them (free or paid) under your Apple ID. Installmacosx.dmg Download Extra Quality