So, on a Mac, PI + PI = 6 ?

Ok, my bad. With the original calculator, I’m getting 6.

Mac OS X 10.4.11 here, and in addition to things mentioned:

Pi + 1=4

Non Mac user, so I can’t check this on my own - but what does π[sup]2[/sup] yield?

Out of curiosity, have you gotten any reply to your bug report yet?

π[sup]2[/sup] = 9.86960440109 in 10.4.11.

Rats. That’s no fun. I was so hoping it would turn out that π[sup]2[/sup] = 10

Apple has almost, but not quite, made an Radcon math calculator.