Mouse bug on Mac

Ever since I updated my mac to the newest software Sierra my mouse when in game bugs out. It will shoot left and right, up and down without me touching it but just a tad. I have already emailed a support tech from riot and we have been working together to try and fix this problem doing everything he has told me to do. I've tried different mice and it's not the mouse itself. The mouse I use works just fine on my friends windows computer but not on my updated mac.

It has been weeks of me not being able to play league and I didn't know what else to do but this. Hopefully this will be fixed soon because I would like to get back to being able to play league again.

[zombie-brand-facepalm]