Macs or MACS may refer to: *a Mac computer, a nickname for the Macintosh brand * "macs" (short story), by Terry Bisson * Magellanic Catalogue of Stars, a catalogue of positions for stars covering large areas around the Large and Small Magellanic Cloud *

MAssive Cluster Survey The MAssive Cluster Survey (MACS) compiled and characterized a sample of very X-ray luminous (and thus, by inference, massive), distant clusters of galaxies. The sample comprises 124 spectroscopically confirmed clusters at 0.3 < z < 0.7. Candidate ...

, a survey of distant galaxy clusters that are very bright in X-ray * Magnetic-activated cell sorting * Manual Ability Classification System for manual dexterity in cerebral palsy * Minimal Access Cranial Suspension, a form of facial surgery or rhytidectomy used to reduce wrinkles and lift sagging facial tissue * MACS (software), Model-based Analysis of ChIP-Seq, software for finding peaks in ChIP-Seq data used in computational biology * Multicenter AIDS Cohort Study * Mac's Convenience Stores, a chain of stores in Canada * Metropolitan Area Commuter System, a bus system in Fairbanks, Alaska * Mountain Ash Comprehensive School, in Wales

See also