| MachineCore | Pennsylvania |
| machineLOGIC, LLC | Colorado |
| MachineMetrics | Massachusetts |
| Machinet | |
| MachineTracking | |
| MachineTranslation.com | |
| MachineTranslation.com | |
| Machnet Technologies, Inc. | California |
| MacHorizon | California |
| MachSol, Inc. | California |
| Macinstruct | New Mexico |
| MacinTech Users' Group, Inc. | Colorado |
| Macintosh Association of Central New Jersey | New Jersey |
| Macintosh Enthusiasts Group of Colorado Springs, Colorado | Colorado |
| Macintosh Users Group of Delaware | Delaware |
| MACJWEB | Nevada |
| Mackay Communications | North Carolina |
| Mackenzie Laboratories, Inc. | California |
| Mackey Web Design Miami | Florida |
| Mackichan Software, Inc. | Washington |
| Mackie | |
| MacKinney Systems | Missouri |
| MacMan, Inc. | Wisconsin |
| MacMedia | |
| MacMedia, Inc. | Arizona |
| Macneel Eisan Associates | Pennsylvania |
| MacNexus | California |
| MACOM | Massachusetts |
| Macomb-Oakland University | Michigan |
| Macomber Communications and Computer Technology, Inc. | New Hampshire |
| Macomp Express Corporation | Florida |
| Macon Raine | Illinois |
| Macon Web Designs | |
| Macondo Vision | Georgia |
| MACorPCRepair | California |
| Macorva | Texas |
| Macparts | California |
| MacPaw, Inc. | California |
| MacPOS Solutions | Ohio |
| MacPractice | Massachusetts |
| MacPrices.net | South Dakota |
| Macquarium, Inc. | Georgia |
| MacQuest Consulting, LLC | Missouri |
| MacRDS | Wyoming |
| Macro Biologics | California |
| MACRO Consulting, Inc. | California |
| Macro Integration Services | North Carolina |
| Macro Solutions, LLC | Oregon |
| Macro Ventures | California |
| MacroFab, Inc. | Texas |