Oh, bother. RPN Calc 11c (my preferred MacOS RPN calculator) has two important features: • Faithful Emulation of HP 11C • Accepts keyboard input (Why the MacOS Calculator application only accepts mouse input to add 2 + 2 is beyond me!) Apple is now warning about the sunset of Rosetta, and RPN Calc 11c was last updated in 2022 and is Intel only. Suggestions for a good ~1980s HP RPN calculator emulator for MacOS running on Apple Silicon?