Is your pen drive not showing data in mac? You don't have any idea how to fix this issue? Then, read this post carefully to resolve this cumbersome problem without any hassle. Well, pen drive is known for its portability, easy accessibility, storage capacity and excellent performance. However, there are reports from users that their pen drive not showing data in mac. There could be number of reasons for this troublesome situation like inserting the pen drive in a wrong way, disconnecting the USB drive inappropriately or removing without unmounting the drive from Mac, virus infection etc. Whatever may be the cause there is an optimum chance that you could lose all your vital data from that particular drive. Thats beside, if pen drive not showing data in mac you can try these steps. First of all, check system profiler by going to (Applications > Utilities > System Information) and look if it's appearing under the device or not. If everything is fine then, it must show up on Mac. And the second thing you can do is to check the Pen drive with disk utility. If you found that the volume is “ghosted” then select the “mount” option. Users can also run fsck command to see any volume errors. However, if still pen drive not showing data in mac then, we recommend you to use a trusted and robust third party tool .i.e Mac Data Recovery Software. Install and run the application it's very user friendly and extract all the files from pen drives.