I haven’t researched recently, but Excel used to run on a single core on the Mac. So any decent sized file would cause tremendous issues. I used to run Windows

I haven’t researched recently, but Excel used to run on a single core on the Mac. So any decent sized file would cause tremendous issues. I used to run Windows via Parallels just to use the Windows version of Excel. Edit: it looks like multi threads were introduced in January 2018 [0]. [0] https://excel.uservoice.com/forums/304933-excel-for-mac/suggestions/9472407-will-excel-for-mac-2016-utilize-multiple-cores-on https://excel.uservoice.com/forums/304933-excel-for-mac/sugg...