I'm having difficulty generating the screenshot on a mac laptop.

I think this is because F7 controls audio, and to use (the F keys) in other applications it you have to press Alt... I'm wondering if this is interfering with the screencap functionality, or I'm just doing something else wrong??

In 1.1.2 F6-F9 will be mapped to F1-F4 I think. It's a known issue. From what I read, you can disable system functions of F keys in mac using OSX equivalent of control panel.

aha - thanks!

Following your reply, I found the obvious "use function keys as standard". Too bad I spent ages trying to disable specific short cuts!

You're welcome! Can't wait for what you'll make.