El Capitan Could Not Be Installed On Your Computer Without
The installation was successful without any issue, and the Mac Mini is working perfectly fine until mid-October. All update was done. In October, I attempted to install MacOS Catalina through 'macOS Catalina Patcher' but no success (by both upgrade and clean install). 'This copy of the Install OS X El Capitan application can't be verified. It may have been corrupted or tampered with during downloading. ' OS X could not be installed on your computer. No package were eligible for install. Contact the software manufacturer for assistance. Quit the installer to restart your computer and try again. Problem: I tried to install El Capitan, but it gives me error messages. If you really want to like El. Jan 03, 2016 Was trying to instal el capitan on my macbook, the installation starts and after a few minutes stops and a messaging saying the os x could'nt be install on the computer, please contact the software editor to get help. I called apple and they said they can't give me any tech support, i guess cause my computer is too 'old'. Answer (1 of 2): You will need to be more specific. The 'cannot be used from this drive' message usually means you placed the installer file itself on a disk that is.
OS X could not be installed on your computer.
No packages were eligible for install. Contact the software manufacturer for assistance.
Quit the installer to restart your computer and try again
Oh dear… When trying to install OS X 10.11 (El Capitan) you may encounter this message. This happens because the the installer certificates are no longer valid when checked against the clock of your mac.
El Capitan Could Not Be Installed On Your Computer System
Don’t panic though as this is easily fixed using Terminal, so don’t restart immediately.
El Capitan Unable To Install
Install El Capitan On Mac
- Click Utilities on the menu bar
- Select Terminal
- Type date 062112422016
- Exit Terminal
- Click Restart
When you restart the mac and try the installer again it will now believe the certificates are valid and will continue as it should.