Yes, there is a keyboard shortcut to edit cells in Excel for Mac. Instead of using F2, you can use the combination of Control + U. Here are the steps to edit a cell using this shortcut:

1. Select the cell that you want to edit.
2. Press and hold the Control key on your keyboard.
3. While holding the Control key, press the U key.
4. The cursor will move to the end of the text in the cell, allowing you to edit it.

Alternatively, you can also use the keyboard shortcut Command + Option + Enter to edit a cell. This will allow you to edit multiple cells at once, as it will activate the array formula editing mode.