When Apple has moved on to a new technology, support for the legacy technology has generally lasted about 5 years. If they wanted the more demanding apps off o

When Apple has moved on to a new technology, support for the legacy technology has generally lasted about 5 years. If they wanted the more demanding apps off of it, it made sense to close the door to 64 bit. Apple has put considerable effort into optimizing the OS. It didn't make sense to do that for legacy support. Apple certainly does care about pro apps, and has done many things that can/do enhance apps developed for current technology. Photoshop showcased the Mac as a performance platform for some time Previous to OS X. I think they played hardball with Apple, trying to bully them into using costly Display Postscript licensing for OS X, and lost. At one point Adobe engineers would interviewed by MacWeek magazine and talked about development. Sometimes managers forced them to do Windows code first because they hated it so much. They described it as working in a sewer. The Mac was far more advanced below the surface of the OS. Color matching support evolved far earlier. Simple things like anti-aliasing an image when scaling it had to be reinvented in every Windows app, but it was an included service of the Mac OS. Clearly the engineers loved Apple even pre OS X. It's too bad that Adobe trying to strong-arm control of a key technology in OS X placed some distance between the companies. The Mac market and In retrospect Apple did the right thing avoiding the proprietary lock. Going with more open standards, and sharing some things they develop has been good for most of us. (except those wanting proprietary lock in)