This is exactly what should have happened if you had released the button just before start scrolling (aka mouse up event), do some scroll, then pressed/hold shift, and next clicked/hold again the mouse button, to do the final mouse selection movements. In response to the smallest move, the text between is automatically added to the selection, and after this you can even release the shift, no matter anymore, go keep moving the mouse (provided that you don't move the scroll) to continue tuning selection.
![jumpy scrolling logitech mouse mac jumpy scrolling logitech mouse mac](https://technohubdigitalsolutions.co.ke/wp-content/uploads/2020/05/s0518138_a17a2cf2-f9c5-40e2-8dc0-33dfd9abff8f.jpg)
Then stop scrolling, hold shift, and do some mouse movement. The text that remains selected is only the one who was selected just before the scroll movement (as if you had released the button just before start scrolling). Do this: with mouse left-click-and-hold, select some text, "freeze any mouse movements" (explain later), then scroll down (but not too much, keep the already selected text visible).
![jumpy scrolling logitech mouse mac jumpy scrolling logitech mouse mac](http://digitaloutletinc.com/1shawna/m510c.jpg)
The same is occurring with text selection. The option is selected, as if you had released the button. Then move the mouse over an option of the pop-up menu (say, "back"), then scroll the wheel. To verify, you can try this: on a browser, press and hold the right button. There they describe (almost?) exactly what I believe is happening here: Scrolling generates a mouse up event for previously pressed button. The closest I could find was a report of a bug in a UI framework written in Python, but so close in behavior that for a second (or a couple, or more -)) I had to question myself if it's really a coincidence (I now, I now.). Not an option for me.Ĭuriously, I've been searching and searching for hours, and seems no one else here is complaining about this. Just sharing my findings, since I'm also annoyed with this issue: as Dolan Antenucci commented, uninstalling LCC will normalize the behavior of hold-mouse-left-button combined with scrolling, but at the cost of losing mouse customization.
![jumpy scrolling logitech mouse mac jumpy scrolling logitech mouse mac](https://turbo.paulstamatiou.com/uploads/2006/10/mxrevolution2.jpg)
press Shift + mouse click/hold again, to finish the selection.Not really a final answer, but as a workaround, to select long texts, you can