There are 45 mathematicians whose last name begin with MACI.
| Macia, Fabricio | Universidad Complutense de Madrid | 2002 |
| Macia, Victor | Universidad Autónoma de Madrid | 2024 |
| Macià Fàbrega, Josep | Massachusetts Institute of Technology | 1997 |
| Maciag, Timothy | University of Regina | 2016 |
| Maciak, Matúš | Charles University | 2011 |
| Macias, Felipe | Instituto de Matemática Pura e Aplicada | 2014 |
| Macias, Jose | Claremont Graduate University | 1998 |
| Macias, Sergio | ||
| Macías, Roberto | Washington University in St. Louis | 1974 |
| Macias Alvarez, Sergio | Tulane University | 1992 |
| Macias Castillo, Daniel | King's College London | 2011 |
| Macías-Cedeño, Marco Antonio | Instituto Politécnico Nacional | 2009 |
| Macias-Diaz, Jorge | Tulane University | 2001 |
| Macías-Ramos, Luis | Universidad de Sevilla | 2016 |
| Macias Romero, Juan | Benemérita Universidad Autónoma de Puebla | 2008 |
| Macías-Romero, Fernando | Benemérita Universidad Autónoma de Puebla | 2002 |
| Macias-Virgós, Enrique | Universidade de Santiago de Compostela | 1983 |
| Maciaszek, Krzysztof | Uniwersytet Jagielloński | 2023 |
| Maciaszek, Leszek | ||
| Maciaszek, Thierry | Institut National Polytechnique de Grenoble (INPG) | 1987 |
| Maciążek, Tomasz | 2018 | |
| Macieira, Joao | Northwestern University | 2007 |
| Maciejewski, Mateusz | 2010 | |
| Maciejewski, Wes | Queen's University at Kingston | 2012 |
| Maciel, Alexis | McGill University | 1995 |
| Maciel, Jorge | New York University | 2001 |
| Maciel, María Cristina | Rice University | 1992 |
| Maciel Forte Chaves, Francisco Icaro | Université de Haute-Alsace | 2021 |
| MacInnes, Charles | The Johns Hopkins University | 1900 |
| MacInnes, Donald | University of Manchester | 2006 |
| MacInnis, Bo Yu | University of California, Berkeley | 2004 |
| MacInnis, David | The University of New Mexico | 2007 |
| Macintyre, Angus | Stanford University | 1968 |
| MacIntyre, Alistair | University of Durham | 1997 |
| MacIntyre, Archibald | University of Cambridge | 1934 |
| MacIntyre, Blair | Columbia University | 1999 |
| MacIntyre, John | Massachusetts Institute of Technology | 1968 |
| MacIntyre, Sheila | University of Aberdeen | 1947 |
| Maciocia, Antony | University of Oxford | 1991 |
| Macionis, Jonas | Vilniaus universitetas | 1976 |
| Maciuca, Romeo | University of California, Los Angeles | |
| Maciuca, Romeo | University of California, Los Angeles | 2006 |
| Mačiulaitytė, Elena | Vilniaus Gedimino technikos universitetas | 2007 |
| Maciulewicz, Jan | Uniwersytet Łódzki | 1964 |
| Mačiulis, Algirdas | Vilniaus universitetas | 1983 |