From BlenderWiki

Other supported operating systems

FreeBSD

Download the file blender-2.##-freebsd-#.#-i386.tar.gz from the “Downloads” section of the Blender Website. Here 2.## is the Blender version (currently 2.49), #.# is FreeBSD version, and i386 is the machine architecture.

To start Blender just open a shell and execute ./blender, of course while running X.

Irix

Download the file blender-2.##-irix-6.5-mips.tar.gz from the “Downloads” section of the Blender Website. Here 2.## is the Blender version (currently 2.49), Python version 2.6, 6.5 is the Irix version, and mips is the machine architecture.

To start Blender just open a shell and execute ./blender, of course while running X. Blender was originally developed for the IRIX platform, but is currently not actively being maintained for all IRIX workstation versions. For some workstations performance troubles have been reported.

Solaris

Download the file blender-2.##-solaris-2.8-sparc.tar.gz from the “Downloads” section of the Blender Website. Here 2.## is the Blender version (currently 2.49), Python version 2.6, 2.8 is the Solaris version, and sparc is the machine architecture.

Currently no further instructions for Sun Solaris are available. Please use the Blender Website forums for support.

Other unsupported operating systems

MorphOS

Port on this platform is maintained by Guillaume Roguez. More information on his wiki (french version).

Current status: 2.46 was the latest released version, but not supported anymore due to the full time work on 2.50 release.

Currently no further instructions for MorphOS are available. Please use the Blender Website or MorphOS forums for support.