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.