DeedMapper is written for PC compatibles but it can run on Macs equipped with BootCamp, Parallels, or Crossover.
Crossover is popular these days. As of July 2023 a user has written detailed step-by-step DeedMapper installation instructions for Intel and Apple hardware platforms. You’ll find the document here.
Please understand that Direct Line Software is not in a position to help if technical issues occur but Crossover support has been very good.