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. Then you can paste the item.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. So if you, say, have a Mac laptop to do field work, and then you get back to the office and work on a desktop Mac, you can set up Flow so that you can copy an item on your laptop, move the cursor through the side of the screen, and switch control of the mouse to the desktop Mac. Flow also supports a few functions, such as cut, copy, and paste. With Flow, you can use one MX Master 3 with two computers and switch between the two simply by moving the cursor through the edge of the screen. If you frequently use multiple devices, Easy Switch is convenient, but there is another feature called Flow that could be very helpful. After you’ve done the initial pairing, all you have to do is press the Easy Switch button to the proper indicator that’s associated with the device you are using, and it is connected. Underneath the mouse is the Easy Switch button, with numbered indicators to show which device the mouse is connected to. The MX Master 3 can be paired with up to three devices over Bluetooth. There’s a battery life indicator in Logitech’s software, but it would be nice if there was a quick view available though the Logitech menu bar icon. I’ve been using the mouse for nearly a month, and I haven’t had to recharge it. Logitech claims that the MX Master 3’s battery can last up to 70 days. Use the Logi Options app to customize all the buttons and scrollwheels.
Logitech will probably have a Big Sur update ready when the OS is updated this fall. I tried the app with a developer beta of macOS Big Sur, and I wasn’t able to get the app to recognize the mouse. It saves all of your settings to the cloud (you have to create an account with Logitech), so if you use the mouse with another device (more on that in a bit), your settings come with you.
You can customize and also assign application-specific functions to all of the mouse buttons and the scroll wheels with Logitech’s software utility, Logi Options. Fortunately, you can use the mode button below the scroll wheel to set the mode. While the switching works well, I prefer free spinning all the time. It switches if you are, for example, quickly scrolling up or down a long webpage. The scroll wheel between the right and left mouse buttons (which itself is a button, too) can automatically switch from ratcheted scrolling to free spinning. For example, if you hold the button down and move the mouse up, it launches Mission Control. The button at the base of the thumb cradle is a gesture button and it works in conjunction with a mouse gesture. Lenty of button on the MX Master 3, and they’re all customizable.