In terms of major differences, the main one any owners of the MX Master 3 will notice is that the MX Master 3 for Mac is listed on Logitech’s website as only offering Bluetooth connectivity - and it doesn’t ship with Logitech’s Unifying USB receiver, which connects its peripherals via a dedicated RF network instead of Bluetooth for greater reliability. The mouse uses Logitech’s Darkfield laser tracking, which provides 1000 dpi on average of accuracy and the ability to track on virtually every surface, and it can also work across Macs and iPads with Logitech’s Easy-Switch technology for connecting to multiple devices. It can run for 70 days on a full charge, and you can get three full hours of use out of just 60 seconds of charge time. The MX Master 3 for Mac ships with a USB-C to USB-C cord in the box instead of the USB-A to USB-C cable that comes with the non-Mac version, and that’s much more convenient for charging and using it dongle-free with modern MacBook computers. Specs are the same for the Mac-specific version, including its quiet scroll wheel with 1,000 lines per second maximum scroll speed, and Logitech’s MagSpeed tech that dynamically enables freewheel scrolling when you’re going fast.
The MX Master 3 for Mac is a very slightly altered twist on the MX Master 3 - consisting mostly of a new paint job that actually pretty closely resembles the old one.