To create a working ISO from a legitimate Install OS X El Capitan.app :
If you lose your mouse pointer, shaking the mouse or trackpad makes it grow large temporarily. Making a 10.11.1 ISO Image Work
: A new API that speeds up system-level graphics rendering by up to 50%, benefiting both professional apps and games.
If you don’t already have it, use the direct link from Apple (replace the URL as needed):
hdiutil create -o ~/Desktop/ElCapitan10.11.1.cdr -size 7.2g -layout SPUD -fs HFS+J -type UDTO -attach ~/Desktop/InstallESD.dmg
Many pre-made ISO files labeled as “macOSXElCapitan10111imageiso work” come from unverified sources. Always verify checksums and scan for malware, especially when downloading from third-party sites.
Open Terminal (found in Applications > Utilities).
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