Hi,
I actually took that bit out of my previous message, not because it was wrong, but because I didn't want to get into an argument about it
What I said was that Hebrew support on the Mac has always been bad, compared to Windows, and very few Mac apps support right to left. This is one reason Macs have never been popular in Israel, other than in their niche at universities and in publishing. The other reason is that they were much more expensive than PCs.
This is much less true nowadays BTW, with Apple getting more and more into the consumer market. iDevices are extremely popular in Israel, and it is by no means uncommon to see someone using a Macbook on the train. I have a new Mac Mini. Hebrew support is still not as good as Windows though, even though a new official Hebrew UI was introduced in OSX 10.7.3.
As for Linux, I've never used Linux in Hebrew, so I can't comment.