Compatible, yes Ready to use with a Mac, no. Here is what is stated at WD main site about the Ultra line of drives: Ultra models Compatibility.Formatted NTFS for Windows® 8, Windows 7 or Windows Vista® operating systems. Requires reformatting for Mac OS® X operating systems.Note: Compatibility may vary depending on user’s hardware configuration and operating system. There is a specific line of drives for Macs called My Passport for Mac Compatibility:.Formatted HFS+ Journaled for Mac OS X Lion or Mountain Lion.Reformatting required for Windows operating systems.Note: Compatibility may vary depending on user’s hardware configuration and operating system. To see the complete info about both types of drives, go to this WD link: You can switch between PC and Mac descriptions by clicking on PC or Mac buttons. The material about compatibility is in the Specs tabs. So, what does this mean for you?
You can use the Ultra with your Mac, although you will have to re-format your Ultra for a Mac. There are instructions somewhere at WD site for how to format a drive for Mac in the WD Support at Formatting will delete any data saved on the drive, so have copies of that data on your Mac or elsewhere you can copy back to the Ultra after it’s re-formatted. Best of luck with this. Powered by, best viewed with JavaScript enabled.
With the My Passport Ultra 4TB connected to a USB 3 port, Crystal Disk Mark measured read and write Switching to my Mac laptop, I ran Black Magic Design’s Disk Speed Test utility, a tool designed for evaluating WD My Passport Ultra verdict. Backing up your data, whether it’s photos, videos.