Ok so I have a 2011 Macbook Pro and last year I got a 1TB WD External Hard Drive for it. It was for both Mac and PC and was working great up till last month. Now it doesn't show up anymore. I looked on System Information and it shows up there and lists this: My Passport 0730: Product ID: 0x0730 Vendor ID: 0x1058 (Western Digital Technologies, Inc.) Version: 10.08 Serial Number: 575836314139304138303935 Speed: Up to 480 Mb/sec Manufacturer: Western Digital Location ID: 0xfd120000 / 4 Current Available (mA): 500 Current Required (mA): 500 Capacity: 1 TB (1,000,170,586,112 bytes) Removable Media: Yes Detachable Drive: Yes BSD Name: disk1 Partition Map Type: MBR (Master Boot Record) S.M.A.R.T. status: Not Supported Volumes: Name's: Capacity: 1 TB (1,000,170,533,376 bytes) File System: MS-DOS BSD Name: disk1s1 Content: DOS_FAT_32 I also checked in Disk Utility and part of it shows up, but it won't let me do anything with it. If anyone can give me some insight or help me try to get this to work again that would be great!