In this Computers & Programming video tutorial you will learn how to format/partition an external hard drive on a Mac. This is really very easy and simple to do and takes practically no time. Click on spotlight search and look for disk utility. That will bring up the list of hard drives. Click on the external hard drive and click ‚Äòerase‚Äô. Then on ‚Äòsecurity options‚Äô select ‚Äòzero out data‚Äô and click OK. This will remove everything from the hard drive. Your external hard drive is now clean. Next click on ‚Äòpartition‚Äô. Here you can create up to 16 different partitions. You can go ahead and create the partitions. It‚Äôs really that simple.