Computer Help and Support

For instance, if you have a USB 2.0 device, it should work on a USB 3.0 port on your computer, only at the slower 2.0 speeds.

I would recommend reconsidering the iMac, as you can buy hubs that plug into the thunderbolt 4 port and expand your ports dramatically both in number and type. They even make hubs that blend seamlessly with the edge of your monitor, wrapping around the bottom edge, so that the hub’s ports are accessible from the front.