Once downloaded, the installer is typically about 6.2GB in size. You'll find it as an application in your "Applications" folder called Install OS X El Capitan.app .
Launch the application ( /Applications/Utilities/Terminal ).
You want the ISO to work . Here are the most common reasons an El Capitan 10.11.6 ISO fails:
Apple does not provide an official ISO file for OS X El Capitan 10.11.6 ; instead, they distribute the installer as a file or through the Mac App Store mac os x el capitan 1011 6 iso download gratis work
Note: This gives you a recovery ISO (500MB), not a full installer. You would then need to download the OS via Apple’s servers during installation.
If you do not have access to a Mac to convert a DMG file into an ISO, you can look for preserved, untouched copies on the Internet Archive (archive.org). Search for "OS X El Capitan 10.11.6 ISO". Always check user reviews and MD5/SHA-1 checksums on the archive page to ensure the file is an unedited copy of the original retail disk. Step-by-Step: How to Create a Working ISO on a Mac
sudo dd if=/dev/disk0s3 of=/tmp/recovery.img bs=1m hdiutil convert /tmp/recovery.img -format UDTO -o ~/Desktop/ElCapitan_Recovery.iso Once downloaded, the installer is typically about 6
Apple provides a direct download link for the OS X El Capitan disk image. This is the safest way to ensure your file isn't corrupted or infected with malware.
# 1. Create a blank disk image hdiutil create -o /tmp/ElCapitan.cdr -size 8000m -layout SPUD -fs HFS+J # 2. Mount the blank disk image hdiutil attach /tmp/ElCapitan.cdr.dmg -noverify -mountpoint /Volumes/install_build # 3. Flash the El Capitan installer files onto the disk image sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction # 4. Unmount the newly built image hdiutil detach /Volumes/Install\ OS\ X\ El\ Capitan # 5. Convert the image into a standard ISO format (.cdr to .iso) hdiutil convert /tmp/ElCapitan.cdr.dmg -format UDTO -o /tmp/ElCapitan.iso # 6. Move the finished ISO to your Desktop mv /tmp/ElCapitan.iso.cdr ~/Desktop/ElCapitan.iso Use code with caution. Creating a Bootable USB Flash Drive
sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction Use code with caution. You want the ISO to work
Older installers often have expired security certificates, which can cause the "This copy of the Install OS X El Capitan application cannot be verified" error. Installation Tip: The Date Trick
Encountering a hiccup? Here are solutions to some common problems:
