# Synchronet — Supported Platforms

Yes — supported Yes* — limited or theoretical No — not supported — — not applicable / predates platform

Circa | Version | Windows | Linux | BSD | macOS
--- | --- | --- | --- | --- | ---
9x / ME | XP / 2003 | Vista / 7 | 8 – 11 | x86 | x86_64 | ARM
Q1 2026 | 3.21 ★ | No | No | No [a] | Yes | Yes | Yes | Yes | Yes | Yes
2025 | 3.20 | No | No [b] | Yes [a] | Yes | Yes | Yes | Yes | Yes | Yes
Q1 2022 | 3.19 | No | Yes [c] | Yes | Yes | Yes | Yes | Yes | Yes | Yes
Q3 2020 | 3.18 | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes
Q1 2019 | 3.17 | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes
Q3 2015 | 3.16 | No | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes*
Q4 2011 | 3.15 | No | Yes | Yes | Yes* | Yes | No | No | Yes | No
─ Legacy versions ─
2005 – 2006 | 3.13 – 3.14 | Yes [4] | Yes | Yes | — | Yes | — | — | Yes | No
2002 – 2004 | 3.10h – 3.12 | Yes [4] | Yes | No | — | Yes | — | — | Yes* [5] | No
2001 – 2002 | 3.00c – 3.10 | Yes | Yes | No | — | Yes [2,6,7] | — | — | FreeBSD [6,7] | No
2000 | 3.00a – b | Yes [3] | Yes [3] | No | — | Yes [2,5] | — | — | No | No
Q2 1997 | 2.30 [d] | Yes [1] | Yes [1] | Yes [1] | Yes [1] | Yes [1] | — | — | No | No
1992 – 1995 | Pre 2.3 [d] | Yes [1] | Yes [1] | Yes [1] | Yes [1] | Yes [1] | — | — | No | No

★ = current release • BSD = FreeBSD, NetBSD & OpenBSD • Vista/7 = NT 6.0–6.1 (incl. Server 2008 R2) • 8–11 = NT 6.2–10 (incl. Server 2012–2022) • Yes* = source builds only, no official binaries • Solaris 8+ and QNX supported from v3.11; source builds only [5]

[1]
  DOS/OS2 emulation only (NTVDM on Windows, DOSEMU on Linux) — no TCP/IP; all BBS services require modem/FOSSIL hardware. NTVDM is present in 32-bit editions of Windows through Windows 10.
[2]
  No FOSSIL/interrupt driver — external programs and door games not supported
[3]
  Windows 95 (original) and Windows NT 3.x not supported due to missing `GetDiskFreeSpaceEx`; Windows 95 OSR2+ or Windows NT 4+ required
[4]
  GUI (sbbsctrl) requires `OLEAUT32.DLL`; obtain by upgrading Internet Explorer
[5]
  FreeBSD, NetBSD, and OpenBSD were added incrementally across v3.10h–3.12; some variants may lack full support in earlier sub-versions of this range
[6]
  No configuration utilities (SCFG) in early Unix ports
[7]
  No JavaScript support in early Unix ports
[a]
  v3.20 is the last release to officially support Windows Vista and 7. In v3.21, `scfg.exe` and `echocfg.exe` fail on Windows 7 due to a new dependency on `GetOverlappedResultEx` (absent from the Windows 7 kernel); patched utility builds were released separately.
[b]
  Windows XP not supported — library dependencies in v3.20 require Windows Vista or later
[c]
  Windows XP compatibility issues documented (e.g. missing `inet_ntop`); XP support was degrading prior to v3.20
[d]
  Native DOS program; v2.30 also had a native OS/2 port. v3.00 and later are native Win32 / Unix programs.