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Hi HD, The WD My Book hard drive comes pre-formatted for Windows OS. However, the hard drive can be reformatted in the supported filesystem for Mac OS. Please refer to the link mentioned below for more information. Reformatting Required for Mac OS Compatibility: https://support-en.wd.com/app/answers/detail/a_id/3879 Need Help? Please see our "'Contact Us" page for information
Sorry, there was a problem. Please try again later.I use mine for a PC computer. On the box it says it is Compatible with macOS High Sierra, Sierra or El Capitan - Compatibility may vary depending on user's hardware configuration and operating system. For MAC: WD Discovery software for WD Securtiy and WD Drive Utiities.
Sorry, there was a problem. Please try again later.This external hard drive works great. It was also very easy to install. Great purchase!
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