: Using tools like TransMac or Apple's official Disk Utility to create a bootable USB drive bypasses many "damaged installer" errors associated with standard recovery mode. Why 10.7.2 was a Milestone
If your output does not match this, your file is . Do not attempt to install it—you’ll waste hours. mac os x lion 1072 dmg file fixed
If you have a legitimate need for OS X Lion, it is safer to obtain the installer directly from Apple or archive.org (which hosts Apple's abandonware as a public archive) and fix the certificate issue yourself. : Using tools like TransMac or Apple's official
Apple’s older installers often have security certificates that expired years ago. This causes the installer to claim the file is "damaged" or "cannot be verified." Incomplete Downloads: mac os x lion 1072 dmg file fixed