I use a lot sketchup on my macbookpro.
When I enter a value + unit in the value box, sketchup calls the tool corresponding to the letter.
For example if I try to indicate 10m (for 10 meters) then when I press the [m] sketchup call the Move tool.
When I indicate 10cm (for 10 centimeter) at the time I press the [c] sketchup call the circle tool.
I do not encounter the problem on every Mac.
I only meet it on macbook pro with the “French-numeric” setting. It is the keyboard setting that allows you to enter numbers when the uppercase key lights green.
I do not have this problem with the “French” setting. But I find it much more convenient to type the numbers with the " French-numeric"
I teach sketchup too. And a lot of my students have encountered the same problem on their macbook
I do not have this problem with the keyboard extended on an imac.
I have not encountered this problem on PC.
This is an old problem.
I made an experiment without changing the settings “French numeric” and capital key light green:
If I enter the number with a numeric keypad blutooth and add “m” with the keyboard of the mac I have no problem
If I enter the number with the keyboard of the mac and add “m” with the same keyboard it calls the move tool