You might be looking for the USB-C version of the Logi Bolt receiver? It's sold out on their website but I'm assuming there's availability on Amazon/Best Buy/eBay, etc. https://www.logitech.com/en-us/shop/p/logi-bolt-usb-receiver...

This must be new? I checked about a month or two ago and ended up buying other products. Well I stand corrected and hopefully I can finally use my mice on my Macbook. Thank you!