'''Mac OS''' is hīred biliþwealdbǣrrabiliþƿealdbǣrra weorcendebyrdnessaƿeorcendebyrdnessa þā sind worhtaƿorhta fram [[Apple Inc.]] for heora Macintosh tēame spearctellenda. Sēo ǣreste fadung wæsƿæs sēo namlēase weorcendebyrdnessƿeorcendebyrdness þe wæsƿæs on þǣm forman Macintosh spearctellende - man hēht hit ''System'' weorcwrithyrstƿeorcƿrithyrst lā. Man sægþ þe þis dyde biliþwealdbiliþƿeald folclīc.
Þǣr wǣronƿǣron twegemtƿegem tēamas Mac OS - Classic Mac OS fram þǣm 1984. gēare oþ þæt 2000. gēar, and Mac OS X fram þǣm 2001. gēare oþ þisne dæg. Hīe bū habbaþ gelīc gemǣne gewealdesgeƿealdes amearcung, ac heora andtimbru sind swīðesƿīðe ungelīc.
