AIX 5.[12] and 5.3-ML1 Apple Darwin 7.x and 8.x for Power Macintosh systems FreeBSD 4.9 for x86-based systems FreeBSD 7.0 for AMD64-based systems Linux 2.1.72 and above for x86-based systems NetBSD 1.[456], 2.x and 3.x for Alpha, x86, and SPARC-based systems NEXTSTEP 3.[13] for NEXTSTEP architectures SCO OpenServer Release 5.0.6 for x86-based systems Solaris 9 and 10