First thing to do is update Yosemite. Download and install OS X Yosemite 10.10.2 Combo Update. See if that fixes the problem with the USB port. Be sure to try the drive in each USB port on the computer if you have more than one.

Connect mobile device to the My Passport Wireless Wi-Fi network. From the App, go to the My Passport Wireless Settings. Select 'More' in the upper corner. Select Firmware. Update the Firmware if an update is available. How to Install the Product Update: Manual Download the firmware to your desktop. Jul 02, 2015  Question: Q: WD Passport and Macbook Pro I just got a new Macbook Pro with Retina Display (OS X 10.10 Yosemite) and I tried to connect my old WD My Passport Essential (USB 3.0) Model WDBACY5000A. My new Mac is not recognizing the external hard drive. May 29, 2020 The WD My Passport for Mac drive comes in some amazing features like cloud storage, password protection with hard drive encryption, and compatiblity with Apple's Time Machine backup software. But the problem is that no matter how powerful this hard drive is, it is possible that this WD My Passport for Mac hard drive is not mounting on Mac computer.

If it still doesn't work then return it to the place of purchase for repair or replacement. If you wish to replace it you must do this within 14 days from date of purchase, and you must return the system to what was originally installed:

Install OS X Using Internet Recovery

Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.

Boot to the Internet Recovery HD:

Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.

Partition and Format the hard drive:

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1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your newly installed hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.

Reinstall OS X: Select Reinstall OS X and click on the Install button. Be sure to select the correct drive to use if you have more than one.

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Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

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This should restore the version of OS X originally pre-installed on the computer.

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Feb 8, 2015 11:35 AM