Currently using 10.9.5 and have been fretting about upgrading to El Capitan and worried if Quicken 2007 would work and then remembered I had an empty partition on my external HD so decided to install El Cap there.
Installation went fine and copied Quicken 2007 over and it seemed to work just fine. I only us the check register and none of the online or investment stuff. Pleased with that.
I used Safari a bit and it seems that, in Safari & Finder too, the menu bar font size was a bit small for my tired old eyes. Is there a way to increase the font size?
Also I'm thinking about getting El Cap set up the way I want, moving all my apps etc, and then wiping my Mini internal HD and cloning El Cap over from my external HD. Can I move my Mavericks mail over to El Cap? If so, how would I do that? I guess my reason for doing it this way instead of installing El Cap over Mavericks is to make it a clean install since I used Migration Assistant to move everything from my old Mini running Snow Leopard to my new Mini running Mavericks. Any thoughts doing it this way? Is a clean install any better than installing over Mavericks?
No matter what you decide be sure all your apps are current and if necessary updated or upgraded to El Capitan certified versions and do a ruthless housecleaning of old unused apps, preference files, launch daemons, launch agents, plugins, etc. That is a good idea even if you choose not to upgrade to El Capitan.