In 1988, Apple released its first [[UnixUNIX]]-based OS, [[A/UX]], which was a Unix UNIX[[operating system]] with the Mac OS [[look and feel]]. It was not very competitive for its time, due in part to the crowded Unix market and Macintosh hardware lacking high-end design features present on [[workstation]]-class computers. A/UX had most of its success in sales to the [[Federal government of the United States|U.S. government]], where [[POSIX]] compliance was a requirement that Mac OS could not meet.<ref name="InfoWorld August 1992">{{cite news |title=Apple finally gets Unix right with A/UX 3.0 |newspaper=[[InfoWorld]] |date=August 10, 1992 |first=Don |last=Crabb |url=https://books.google.com/books?id=ElEEAAAAMBAJ&pg=PA68 |pages=68–69 |df=mdy-all |access-date=October 1, 2016 |archive-url=https://web.archive.org/web/20160801194024/https://books.google.com/books?id=ElEEAAAAMBAJ&pg=PA68 |archive-date=August 1, 2016 |url-status=live }}</ref>
