In 2019, Apple’s certificate for the Mac App Store downloads of OS X Lion and Mountain Lion expired. When a user tries to install the original, untouched Install Mac OS X Lion.app (or mount the InstallESD.dmg) on a modern Mac, the system often rejects it because the cryptographic signature is no longer valid.
Have questions or found a new fix for the Lion 10.7.2 DMG? Leave a comment below. For vintage Mac repair, always backup your data before any OS modification. mac os x lion 1072 dmg file fixed
rather than physical discs, obtaining a working DMG for legacy hardware can be tricky. Common Issues with Legacy DMGs In 2019, Apple’s certificate for the Mac App
(Replace the path with your actual file location, renaming to Lion). Leave a comment below
: Addressed a frustrating bug where the menu bar would disappear in full-screen mode.
hdiutil convert /path/to/broken.dmg -format UDRW -o fixed.dmg
Many users who download old Lion DMG files today encounter a frustrating error: "This copy of the Install Mac OS X application is damaged and can’t be used to install macOS."