System Requirements

Windows

Operating Systems (32-bit and 64-bit)

  • Windows 7 SP1 with KB4474419 SHA-2 code signing support added
  • Windows 8
  • Windows 8.1
  • Windows 10
  • Windows 11

Please note that SeaMonkey 2.49.5 was the last release to run on Windows XP and Vista.

Minimum supported Hardware

SeaMonkey on Windows needs a CPU supporting the SSE2 instruction set.
  • Intel Core 2 Duo 1.8GHz or greater
  • AMD Phenom 1.8GHz or greater
  • 2 GB RAM for the 32-bit version
  • 3 GB RAM for the 64-bit version
  • 500 MB of free hard drive space

macOS

Operating Systems

  • Mac OS X 10.11 or higher

Please note that SeaMonkey 2.53.14 was the last release to run on OS X 10.9 and 10.10. Because of a build error SeaMonkey 2.53.15 does not run on OS X 10.11.

Minimum supported Hardware

  • Any Apple Mac running mac OS X 10.11 or higher
  • 3 GB RAM
  • 500 MB of free hard drive space

Linux

Software Requirements

Please note that Linux distributors may provide packages for your distribution which have different requirements.
  • The following library versions (or compatible) are required:
    • GTK+ 3.22 or higher
    • GLibc 2.17 or higher
    • Pango 1.22 or higher
    • X.Org 1.20 or higher
    • libstdc++ 4.8.5 or higher

Minimum supported Hardware

  • Intel Core 2 Duo 1.8GHz or greater
  • AMD Phenom 1.8GHz or greater
  • 2 GB RAM for the 32-bit version
  • 3 GB RAM for the 64-bit version
  • 500 MB of free hard drive space