A solar still is a simple and sustainable device that converts saline or brackish water into potable water using solar energy. However, its practical use is limited due to low distillate yield. This study aims to enhance the performance of pyramid-type solar stills (PSS) by integrating magnetic fields to improve evaporation dynamics and thermal efficiency. The central hypothesis is that applying magnetic fields can alter the physical properties of saline water-reducing surface tension and specific heat capacity-to accelerate the evaporation process. Two configurations were investigated: the Conventional Pyramid Solar Still (CPSS) and the Magnetically Modified Pyramid Solar Still (MPSS). Outdoor experiments were performed under Baghdad's climatic conditions (33.3 degrees N, 44.6 degrees E) from April to June 2025, supported by theoretical modeling using the enthalpy-porosity method to simulate coupled heat and mass transfer. The results revealed that magnetic field application markedly improved system performance, with freshwater productivity increasing by up to 68.2 % and thermal efficiency reaching 49.24 % at a magnetic intensity of 2430 mT. Positioning the magnetic plates inside the basin enhanced yield by 13.76 %, while a parallel plate arrangement generated the most uniform magnetic flux and highest evaporation rate. Economic evaluation indicated that the MPSS achieved a faster cost recovery (272 vs. 492 days) and a higher lifetime profit ($6057.76 vs. $1783.81) compared to the CPSS. The findings confirm that magnetic field integration offers a viable route to improve the thermal and economic performance of solar distillers, providing a promising low-cost and eco-friendly solution for freshwater production in arid regions.