The drive should say unallocated; Note: If it does not you will need to right-click and delete the volume first. If the external hard drive is pre formatted for Mac, Disk Management will list 3 partitions and you will not be able to delete the 'Health (EFI System Partition)' because it's a protected partition. If you simply want to have a data drive that can be shared across Mac and PC just format the drive in ExFAT. External drives come partitioned, you simply want to reformat it with an ExFAT partition. Just make sure you are using SP1 or later in Vista to enable ExFAT.

How to format a drive in Mac OS 10.6 to 10.10 Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. The following is based on Mac OS X version 10.10.5. However, the steps are suitable for Mac OS X 10.6.8 to 10.10.5. For instructions on how to format a drive in Mac OS 10.11 (El Capitan) and above click. To reformat the drive in Mac OS X: 1.

Open Disk Utility Applications>Utilities>Disk Utilities 2. Select the Seagate drive on the left that shows the capacity 3. Select the Partition tab on the right hand side of the Disk Utility Window 4.

Select Partition Layout and select 1 partition 5. Next to name you will see untitled 1 where you can name the drive. This will be the name shown when the drive mounts. Change Format to Mac OS Extended (Journaled) 7. Select Options and select GUID Partition Table 8. Select Apply You will get the follow window advising you that this is a data destructive process and any data currently on the drive will be deleted 10.

Select Partition to finish the formatting process.

> > How to Format Seagate External Hard Drive under Mac OS? How to Format Seagate External Hard Drive under Mac OS?

By Shirly Chen, 2016-11-10 “Hi, anyone can tell me how to format a Seagate external hard drive on Mac? I am going to sell my 2TB Seagate external hard drive.

Before sending it away, I want to make sure all the data on it has been permanently erased. So I try to format it on my Mac. However, I didn’t find a way to format Seagate external hard drive under Mac OS. Is it possible to do this?” – Manie Formatting is the best way to give an old Seagate external hard drive its new life. It is easy to format a Seagate external hard drive on Windows PC. However, if you want to format a Seagate external hard drive on Mac, it is not as easy as formatting it on a PC. Cause this feature is ‘hidden’ inside your Mac OS.

And in some cases, you need both formatting Seagate external hard drive and permanently wiping data on it. Such as these cases: • You will resell, donate or give away your old Seagate external hard drive. • You are going to lend your Seagate external hard drive with someone else or share it with other people. • You are disposing your old Seagate external hard drive or throwing it into trash.

• You plan to send your Seagate external hard drive to be repaired. In the cases above, you need to format your Seagate external hard drive and permanently on it, leaving no chance for data recovery. Only can achieve the double effects. Offers secure and easy solution to format Seagate external hard drive and permanently wipe all existing data and history data. Cases for mac pro retina 2015 13 sleeves. Format Seagate external hard drive with Super Eraser for Mac gives clear way to format Seagate external hard drive under Mac OS because it is so easy-to-use.

You just need to connect your Seagate external hard drive with your Mac and run this Mac data erasure software to format it, here is the instructions. Select mode “Wipe Volume/Device” –> Select your Seagate external hard drive -> Click on “Wipe Now” button. Then it will automatically format your Seagate external hard drive and wipe all existing/history data. You will get a brand new Seagate external hard drive. Since this Mac data erasure will permanent wipe all data on your Seagate external hard drive while it is formatting your Seagate external hard drive under Mac OS.

So please back up your important files before you run it to format your Seagate external hard drive. It also supports to format Mac hard drives, USB flash drives, external hard drives, digital cameras, SD cards, etc under Mac OS.