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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Mac parts 13 letters:

COMPUTERCHIPS: Mac parts
BUN: Big Mac part
SYS: Part of Mac OS: Abbr.
SYS: Part of Mac OSX: Abbr.
SYS: Mac OS part: Abbr.
CHEESE: Part of a Big Mac