After installing NTFS for Mac OS X and rebooting it is not possible to mount NTFS partition.
After using NTFS drive in Windows you have detached it without removing it safely. Therefore NTFS journal has not been emptied from temporary streams.
To fix the problem, open Disk Utility under Mac OS X. You will find it in Applications – Utilities.
Choose NTFS partition on the left and find First Aid tab on the right. Under this tab you will find Verify Disk option. Run Verify and then Repair.
In most cases Verify will show a note “Native NTFS journal is not empty”. If there is no such message but other file system errors have been detected by Verify, still please run Repair.
Please take screen shots of Verify and Repair outupt just in case.
Now please detach hard disk from your computer, and then connect it back. Now NTFS volumes should be automatically mounted.
It is important:
“NTFS journal is not empty” error may appear on the drive if it wasn’t safely removed in Windows. Please always use “Safe remove” when you finish work with NTFS drive in Windows.
Please check whether driver has been activated:
Open System Preferences panel – NTFS for Mac OS X – Info
Check whether Product Key and Serial Number have been entered in respective fields and online activation has been successfully completed.