Browser:
Mac OS 10.6 and 10.8: Firefox 48
Mac OS 10.9: Firefox 61+, Chrome 54-64
Mac OS 10.10 and 10.11: Firefox 61+, Chrome 68+
Mac OS 10.12 and higher: Firefox 61+, Chrome 68+, Safari 10.1+
PC Windows XP: Firefox 52+

Decompression Software:
Mac OS 10.4+: Stuffit Expander 12
Mac OS 10.3-10.3.9: Stuffit Expander 10.0.2
Mac OS 10.1-10.2: Stuffit Expander 8.0.2
Mac OS 9: Stuffit Expander 7.0.2
PC: WinZip 12 or Stuffit Expander
Adobe Reader 7.0