I have an older MacBook Pro (Late 2011) which came with a built-in optical drive. I replaced the built-in SuperDrive with a second hard drive. However, the USB SuperDrive is not compatible with Macs that came with built-in optical drives.
I tried modifying the
/Library/Preferences/SystemConfiguration/com.apple.Boot.plist file with the
mbasd=1 flag as I would have in Yosemite/Mavericks. However, I was presented with an
Operation not permitted message, even when I tried this as root. (As it turns out, this is because of the new System Integrity Protection introduced in El Capitan, which supersedes root)
Is it possible to get a USB SuperDrive working in El Capitan? If so what are the steps?