It’s not graphics as in 3D graphics but desktop publishing. I think it mainly relates to prepress in print shops and graphic design (e.g illustrator, Indesign etc). Macs have always had better print tools, font handling, color accuracy etc. For 3D graphics, they are pretty lame - no Geforce 8x series support, generally weak GPUs etc.
You can’t get the same hardware but you can get hardware that performs similarly, cheaper. Apple use more expensive mobile components in their consumer desktops to make quiet, cool machines. This is actually why their GPUs are weaker too because they choose cooler ones and sometimes under-clock them.
If you want performance from a Mac, you really have to go for a Mac Pro but that’s an expensive Xeon workstation, not really meant for consumers. So hardware-wise Apple like to think that you’re one of two kinds of people, grandma checking email in which case you get a Mini or iMac or you are a pro earning lots of cash and you get a Mac Pro.
Their desktop product line-up is very narrow-minded. The laptops are fine but the desktops are not that great at all.
Now software on the other hand, that’s a different story. For development work and lots of text-based stuff, unix based systems are far better than Windows. Memory management and general system stability is way better and the tools are better.
Linux and Mac satisfy this.
Macs have a better desktop experience - I would say the best out of all the systems. Linux is better for development than Windows and has better hardware than Mac. Windows has a better desktop experience than Linux, worse than the Mac but is worse than both for development but again better hardware than Mac. It’s all about what works best for you personally.