In online forums (InsanelyMac, Reddit, or obscure GitHub Gists), "81 fixed" likely refers to a patched version of a bootloader file (perhaps boot.efi version 81 or a modified TransMac.exe build 81) or a specific DD command that corrects byte 81 in the boot sector. Alternatively, it could denote the -no_compat_check flag applied to OS X 10.8 Mountain Lion (build 12A81) to bypass compatibility checks.
A more technical interpretation: When creating a compressed live DVD, the boot process fails with an error code 0x81—"device not configured." The "fixed" implies a patch to the IOStorageFamily.kext or a custom com.apple.Boot.plist that includes: mac os x live dvd highly compressed dvd transmac 81 fixed
<key>Kernel Flags</key>
<string>rd=udf wait=60 -v</string>
This extends the timeout for the optical drive to spin up and decompress the root image. Without this fix, the bootloader attempts to mount the compressed DMG before the DVD drive is ready, leading to an infinite reboot cycle. In online forums (InsanelyMac, Reddit, or obscure GitHub
Short answer: Yes, but with major caveats. This extends the timeout for the optical drive
Assume you have downloaded a file named Mac_OS_X_Lion_Live_Fixed.7z (approx 3.9GB).