GEORGESLEGRAND  Already in the Mac Classic times, I found that Textures was outrageously expensive for something build upon the free TeX engine. The interface was OK, but certainly not worth the $600-$700 it cost at the time, so I settled for the not-so-user-friendly but free UNIX alternatives.

Now they want to charge $100 for a beta OS X version that you cannot even try before buying, when there are truly excellent free alternatives (e.g. the award-winning TeXShop). They must be totally out of their mind.  
(Version 2.2b8)

GEORGESLEGRAND  Maple 12 is even worse than the previous versions. Very slow on a Mac G5 2GB DRAM; basically unusable. Terrible interface and terrible documentation. Stay away from it if you can. Mathematica is better, but it also affected by the bloated software syndrome. Consider using the open-source SAGE package for serious work; it is getting better by the day.  
(Version 12.0)