Having a diverse set of professional skills, reaching from architectural design to data management, I can provide you with a unique perspective when it comes to handling your complex XLSX files. Despite having different areas of expertise, the tasks at hand share common elements such as attention to detail, precision, and problem-solving ability. These are qualities I've honed throughout the years and can guarantee you that I will use them to ensure successful conversion and improvement of your XLSX file for use on a Mac M3 Sequoia.
Throughout my career, I have gained extensive knowledge and mastery in Excel operations such as formulas, macro-usage, unlocking formulas, and adding filters. Moreover, I'm well-versed in creating and modifying Pivot tables - another key point for this project. My familiarity with Mac operating systems extends to Sequoia compatibility issues, therefore minimizing the chance of unexpected surprises.