I suspect you’re right. I very much enjoyed the Magic Mouse but had similar issues with wrist discomfort. The neutral position of the human wrist is vertical - thumb pointing up as if shaking hands with someone. The Magic Mouse is so low-profile that it forces the wrist into an almost 90deg rotation. Ergonomically, it’s highly problematic.
The solution for me was to switch to a vertical mouse (well, almost) that allows the wrist to remain neutral. Because I missed the gestures I added a Magic Trackpad on the left side of my keyboard. Of course this suffers from the same ergonomic problem but I only reach for it sporadically so the impact is minimal.
The solution for me was to switch to a vertical mouse (well, almost) that allows the wrist to remain neutral. Because I missed the gestures I added a Magic Trackpad on the left side of my keyboard. Of course this suffers from the same ergonomic problem but I only reach for it sporadically so the impact is minimal.