idk why but i'm having an issue where my cursor gets stuck, right click still works but sometimes it gets stuck, and left click doesn't even work at all. the only way where I have been able to fix it is by rebooting my computer. its seems that this issue only happens when I use my tablet pen. I've seen people post about this issue in 2010 but there is no solution. My model of mac is from 2009 so it makes sense that the same issues would happen back then. I have another issue where I can't see anything on my computer, its pitch black and I can only see through my huion tablet. i've been thinking about updating my computer to the latest model so I don't have to suffer these issues anymore. (this animation was made with my mouse not my pen)
