I've partitioned a 1TB SSD using Mac OS X 10.6.8 so I can run legacy programs such as Eudora, AppleWorks and Palm Desktop. All went well until the El Capitan installer failed with -

"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 compute and try again

Restart"

Any advice on how to solve the problem Please.

MacBook Pro 6.1 Running OS X 10.6.8 and El Capitan from an external FW800 drive