Have just received word that Sybyl X 1.3 with full support for Macintosh, Windows 7 and Linux platforms will be released “later this month”. This has not made the official Tripos news releases pages yet.
This will be the first release of Sybyl X1.x for the Mac, as the previous version was 8.1. Look forward to actually trying it this time. The experience of using 8.1 on my Mac when Linux had the X release was a bit underwhelming.