SunOS 4.x

SunOS was a UNIX based OS derived from BSD. Initially released in 1982, it was the standard OS on Sun Machines at that time. Platforms supported by this OS were the Motorola 68000, the Sun 386i, and the SPARC. SunOS machines are still actually in use today powering dams and bread factories.

SunOS took a shift starting with version 5.0, which changed its base from BSD to Unix System V Release 4, and became Solaris. The last release under the SunOS name was Version 4.1.4, released in November 1994.

Release notes

4.0 includes a new virtual memory system, dynamic linking, automounter, System V STREAMS I/O and Sun386i support.

Installation instructions

Note that installing the CD version on real hardware may require a SCSI CD drive that supports 512 byte sectors.

Product type
Sun Microsystems
Release date
End of life date
Minimum CPU
SPARC processors
User interface
Download count
1 (1 for release)


Download name Version Language Architecture File size Downloads
SunOS 4.1.3 (CD) [Sun SPARC] 4.1.3 English 39.34MB 0
SunOS 4.0 (Tape) [Sun-2] 4.0 English 8.56MB 0
SunOS 4.0 (Tape) [Sun-3] 4.0 English 9.12MB 0
SunOS 4.0.1 (3.5) [Sun386] 4.0.1 English 30.27MB 0
SunOS 4.0.3 (Tape) [Sun-2] 4.0.3 English 6.61MB 0
SunOS 4.0.3 (Tape) [Sun-3x] 4.0.3 English 9.37MB 0
SunOS 4.0.3c (3.5-1.44mb) [Sun SPARC] 4.0.3c English 28.1MB 0
SunOS 4.1.1 (Tape) [Sun-3] 4.1.1 English 55.84MB 0
SunOS 4.1.1 (Tape) [Sun-3x] 4.1.1 English 59.56MB 0
SunOS 4.1.1U1 (Upgrade) (Tape) [Sun-3] 4.1.1U1 (Upgrade) Upgrade English 2.08MB 0
SunOS 4.1.2 (CD) [Sun SPARC] 4.1.2 English 30.47MB 0
SunOS 4.1.3 Source 4.1.3 English 15.63MB 0
SunOS 4.1.4 (CD) [Sun SPARC] (alt) (raw ISO) 4.1.4 English 75.98MB 1
SunOS 4.1.4 Solaris 1.1.2 Source 4.1.4 English 18.06MB 0


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