I'm new to Picoscope and oscilloscopes in general. I installed Picoscope 6 beta on Windows 8.1 first, then saw that there is a Mac version as well. Since I'm primarily a Mac user (running Windows in vmware), I tried the software, but it is nigh impossible to use:
* hard to click on stuff (close window, activate button, etc). I had to click several times (three to four times in order to accomplish a "click"
* zooming - I can't get it to work
* startup time - it took several minutes to start (this is on iMac, SSD disk...)
All of this on OS X 10.10.4. I hope you make a decent mac version as well real soon. I read somewhere you use .NET on windows - you could try Xamarin or something along those lines for Mac as well... perhaps.