Because they build it for PCs, and then the port to MAC...but they have only "x" amount of software engineers
They not only have to make bug fixes for PC, but work out a completely different platform!

So while I know yer being humorous ;) at the end of the day, folk need ot see the realities.
Bigger companies have the same problems, but they have more staff to fix these woes.

Go read the forums for other apps...

"I'd rather be a Fool who believes in Dragons, Than a King who believes in Nothing!" www.silverblades-suitcase.com
Free tutorials, Vue & Bryce materials, Bryce Skies, models, D&D items, stories.
Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!