Sharing Keyboard and Mouse

I'm using two computers, and while Microsoft Garage Mouse without Borders worked well with Windows + Windows, I've started using a Mac + Windows, and since that program isn't supported, I've been in a bit of a dilemma.

For the time being, I quickly ordered a KM switch from Amazon.

The delivery is so slow, ugh... Eventually, I started searching for sharing software.

I was considering Synergy and Sharemouse; Synergy feels like it's progressing slowly.
In the end, I decided to purchase Sharemouse.

Final thoughts: It feels less smooth than Microsoft Garage Mouse without Borders on Windows + Windows.