I had insensitivity problems with my 7,2's MM2 develop a bit after it was new. It worked wonderfully well at first. Then after a few weeks, it lost sensitivity in the "nose" - the part closest to the computer. A week or so later, it began freezing randomly. Then it was time to turn it off & back on. That mostly worked.
So I called Apple and talked to a rep who I'm now convinced had never seen a 7,2. He didn't have any suggestions, but decided I needed to swap my mouse for a new one.
The new mouse arrived with a different color scheme from the original - it still has a black top, but a much darker grey underneath. It seems to work a little better. At the suggestion of one of the web site members here (sorry I forgot who) I moved my DEST 6.0 wireless phone base a few feet further away from the computer case.
After several weeks there have been no more freezes (new mouse or moved phone?) don't know which and it's a pain to move the phone back where it was to see if the freezes would return.
The sensitivity remains less than desirable. The nose of the mouse is still numb. If I want to swipe sideways and have it work more often than not, I need to stroke it on top, about halfway from front to rear. Even then it doesn't always do its thing. Brushing either way (up, down or sideways) near the nose has no effect.
Maybe I'll need to try the Logitech MX Master 3?
Tom
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It looks as if there are a couple of threads about this in the Apple web site:
https://discussions.apple.com/thread/2236304?page=1
https://support.apple.com/en-us/HT204621
Note that interference from 2.4gHz devices or maybe even secondary monitors can cause some problems.
I couldn't find anything about sensitivity...
Tom
