Ok - found the answer: https://www.embarcadero.com/products/rad-studio/rad-studio-data-sheet.pdf second page:
PC running Windows connected with an Intel-based Mac, with 2 GB RAM or more, running OS X 10.8 (Mountain Lion) or 10.7 (Lion) over a local area network using a SSH, VNC or Windows file sharing solution
Apologies & much appreciated if you've attempted to help me: