How is Lightroom on the Mac anyhow? From some years back I remember Adobe software being really crappy Carbon-based legacy-ware, many bugs, slow, unintuitive. Is Adobe software from today state-of-the-art 64-bit Cocoa? With good usability?As long as Apple keeps on changing development languages to lock-in application developers it will cause this kind of problems to large, complex applications like Adobe's. Carbon was a C/C++ interface, while Cocoa is Objective-C, and porting from one to the other required a whole rewrite of the user interface code in a very different language.
Slow - this kind of applications usually require enough powerful and fast hardware is you're going to work on large images - CPU, memory and disk.
There are trial versions of Adobe software you can try it yourself. Lightroom user interface is far more intuitive than Photoshop, being designed for the photographic workflow, but as any powerful applications it requires some knowledge of how it is designed and works to really take advantage of it. Don't believe to start it, move some sliders and get great photos...
Anyway if there was software that keep Apple alive before the iPhone it was Adobe software. Without it, Apple would have gone years ago, only the media/graphics market keep it alive thanks to Adobe applications. It's funny how many Apple users complain about Adobe...
Cocoa has been around for quite a while, and given the quality of Adobe's code-base they had to do some serious rewritings for 64bit anyhow. I also do not understand the Objective-C and vendor-lock-in argument; it's the technology they inherited with NextStep, and they've been as much hostage to that language and run-time as everybody else!
I will try Lightroom; at first it seemed that the "cloud"-stuff subscription was the only option to get it, but there does seem to be a possibility of buying it, too. I don't mind that it's a professional application that needs some know-how, otherwise I'd be happy using iPhoto, which I'm not.
Regarding the complaining about Adobe: I'm not one of the old-school Apple users, i.e. not a creative guy that has been using a Mac since the pre-OS X days. I never even looked at a Mac before OS X, when suddenly a Mac could do 99% of what a Linux could do, natively :-)