IRIX 6.5

IRIX was a operating system created by SGI (Silicon Graphics Inc) that was based off of System V Unix. In addition, this OS had additional BSD elements. It's initial release was in 1988 and was designed to on MIPS processors. IRIX machines were typically used for visual effects in the entertainment industry and in the scientific community for several years after the fall of Amiga in the early 90s.

IRIX was the OS that introduced the XFS file system, used in some Linux distributions.

Release notes

IRIX 6.5 was the last full release. All later releases are distributed as a set of "overlay" updates, that require 6.5 to be installed first.

Product type
Release date
Minimum CPU
User interface
Download count
45 (17 for release)


Download name Version Language Architecture File size Downloads
IRIX 6.5 Foundation 1 6.5 English 485.5MB 7
IRIX 6.5 Foundation 2 6.5 English 224.51MB 5
IRIX Development Foundation 1.2 for IRIX 6.5 6.5 English 110.55MB 5


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