My computer only has 2 usb ports but I would like to run 4 controllers. Has anyone done this?

I bought controllers with usb ends off of amazon and they work great, can I get a usb splitter and run 2 through each port?

I have also seen an adapter to run the original N64 controllers through a usb port, has anyone used one of those?

I am running OpenEmu through a Macbook Pro running Catalina. Any help would be appreciated, I am new to this.

Thanks,