MS Windows:

• Download setup program for MS Windows 2000SP4 or later operating system with approximately 128MB of available RAM. 

Apple Mac OS/X 10.5.x (and later) require the latest version of X11/Xquartz to already be installed to run properly. XQuartz can be downloaded from here. Please see the README1ST file inside the DMG for more installation information.

• 10.9.x (Mavericks), 10.8.x (Mountain Lion), 10.7.x (Lion) Intel 64Bit, 10.6.x (Snow Leopard) Intel 64Bit DMG can be downloaded here.
• 10.6.x (Snow Leopard) Intel 32Bit, 10.5.x (Leopard) Intel 32Bit DMG can be downloaded here.
• 10.5.x (Leopard) PPC, 10.4.x (Tiger) PPC DMG can be downloaded here