(assuming your USB drive is named "MyVolume"):
Add smc.version = "0" to the .vmx file to prevent startup errors. For VirtualBox: Create a new VM, selecting "Mac OS X" (64-bit) as the OS.
After a successful installation of the 10.11.6 ISO, you should: mac os x el capitan 1011 6 iso download gratis work
Method 2: Pre-compiled ISO Downloads for Windows and Virtual Machines
Make sure your computer can run this older software. (assuming your USB drive is named "MyVolume"): Add smc
If you want to do a clean install on an older Mac, you will need a bootable USB drive.
hdiutil create -o /tmp/ElCapitan -size 8g -volname ElCapitan -layout SPUD -fs HFS+J hdiutil attach /tmp/ElCapitan.dmg -noverify -mountpoint /Volumes/ElCapitan sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/ElCapitan --nointeraction hdiutil detach /Volumes/Install\ OS\ X\ El\ Capitan hdiutil convert /tmp/ElCapitan.dmg -format UDTO -o ~/Desktop/ElCapitan_10.11.6.iso mv ~/Desktop/ElCapitan_10.11.6.iso.cdr ~/Desktop/ElCapitan_10.11.6.iso If you want to do a clean install
If you downloaded the official file from Apple and need an ISO file for VirtualBox, VMware, or burning to a DVD, you can use the Terminal app on macOS to create it quickly.
For example, a version of the El Capitan 10.11.6 Installer.cdr file is known to have a file size of 7,677,251,584 bytes. You can use a tool or the terminal command md5 on your Mac to generate a checksum for your downloaded file and compare it to a known-good value provided by a trusted source.