This tutorial gives an instruction to format a disk to NTFS using Paragon NTFS 15 under Mac OS X.
Step 1: Download and install Paragon NTFS for Mac 15. Paragon NTFS for Mac costs $19.95 and offers a ten-day free trial. Just right now, you can go to Paragon NTFS for Mac 15 discount page (coupon applied) to gain 25% OFF on purchase from Paragon Software store.
Step 2: Launch Paragon NTFS 15 from System Preferences
Step 3: Select the Disk you want to format to NTFS from the left side, then click on Erase button
Step 4: Choose NTFS format
After a few seconds, the disk will be formatted to NTFS completely.