But if you want another cursor theme, you can (some users here have done that I believe): https://askubuntu.com/questions/66843/how-to-change-mouse-cursor-and-theme
If the problem is locating the cursor in the first place, a most efficient
solution (I believe) is to enable the related switch in the "Keyboard and
mouse" section of "Tweak Tools". In this way, pressing the Ctrl key makes
some visual waves around the cursor.
