@d-healey ah, I thought you had to launch HISE from the Run command in Xcode! That's why it was running debug. I found the executable file in : projects/standalone/Builds/MacOSX/build/Release
This solves the problem with the Save button. Many Thanks
@d-healey thanks for clearing that up. The instructions said open either standalone or plugin version so I was unsure which. The standalone version has compiled with no issues. Thanks