I. Mac /mæk/ BrE AmE noun
1 . [countable] trademark informal ((Apple) Macintosh) a type of personal computer ⇨ PC :
Can you run this software on a Mac?
2 . American English spoken old-fashioned used to address a man whose name you do not know
II. Mac ‧ in ‧ tosh /ˈmækɪntɒʃ $ -tɑːʃ/ BrE AmE ( also Apple Macintosh ) ( also Mac informal ) noun [countable] trademark
a type of personal computer