I’m sorry to say that I can no longer pay the annual $99 fee to keep Console Calculator on the Mac OS X app store. As a side gig for me, I don’t have the time to keep this maintained. I have made a previous build available for free, at this link: http://www.zoesoft.com/downloads/CCalc_MacOSX.zip
I hope that works for those of you on Mac OS X. I’d be interested to partner with a US-based Mac OS X developer to keep the project alive. Perhaps we can find an arrangement. Contact me!