Installing Roxio Toast 14 with El Capitan
I have tried many times to install Toast 14 on my Mac Mini running El Capitan... 4 GB RAM. It craps out almost from the beginning.
Mac mini (Mid 2011), Mac OS X (10.7.2)
It appears the latest version is Toast 14.1 you can get a free update to this version here - http://www.roxio.com/enu/support/software_updates/toast/v14/
Based on past experience with Toast and the size of this update it looks like it might be a complete replacement of the original files. According to the release notes 14.1 added compatibility for El Capitan so if you have been trying 14.0 then this might explain your problem.