I know some Mac folks might not want to do this but one possible solution is to set up another partition on the internal drive (or use an external drive) that boots up from an older version of the Mac OS. I, for one, have stayed with Snow Leopard after reading that Lion and it successor won’t run PPC apps when Apple abandoned Rosetta. (I have no problem with Uwe’s app on Snow Leopard). I depend on some older utility apps, several that came free with an older Mac years ago. Their updated descendants now require a pay-for-license fee. When I wear out this great MacBook Pro and have to buy a replacement I may have to leave behind some old software friends