What to Choose: GUID Partition Map or Apple Partition Map?

Many Mac owners wonder which partition map is better when it comes to formatting external portable HDD. The most popular options are GUID and Apple partition maps even though some other god ways exist.

To begin with, it depends on the type preferred by the user. For instance, you would like to format the hard drive with HFS+ type. Some people wonder if this one is the same as Mac OS Extended Journaled type.

Answering Your Questions One by One

mac os partitions

First of all: yes, HFS+ is really the same as Mac OS Extended Journaled type, but that’s not the point.

As for the main question, to make it short, most experts would recommend using GPT (GID Partition Map). If you need to go into the details and find a reasonable explanation, keep on reading the post.

In fact, the type of partition map makes almost no difference for non-bootable volumes. Thus, if a Mac owner does not plan to start Mac OS X or another operating system from the external hard drive, he or she can apply any type of the partition map without breaking the head against the wall. Several maps are available (e.g., APT, MBR, etc.)

Circumstances That Predetermine the Preferred Partition Map

Here are several scenarios to consider when choosing a partition map:

  • What if booting is something you would like the target HD to do? Booting an OS X from the target drive makes GPT the preferred option.
  • Those who wish to start OS X (PPC) from the target hard drive must stop on APT.
  • In case a user wants to boot Linux, Windows or another non-native operating system on Apple computer, it is important to pick MBR.
  • If a Mac owner applies BootCamp or rEFI, a GTP is a choice once again.

Remember: The only thing that matters is which file system is within the partitions.

As for the Mac OS X Extended (Journaled), it is a bonus to the file system, which can be found in the Disk Utility drop-down menu. It is better to leave journaling on in most of the situations. It is worth the information it stores in case of an unexpected loss of power.

Think about Doing a Partition on Seagate External HD

Have you thought about coming up with a partition on Seagate 1TB external hard drive? It is not that difficult even though it requires multiple steps. On the whole, it will take about five minutes to finish the process.

  • Connect the external HD to the target Apple device.
  • Store the data you already have on the Seagate external HD on your Apple computer or another device that makes it possible.
  • Launch Finder. Pick the Applications folder. It is in the Favorites menu.
  • Pick Utilities and double-click Disk Utility.
  • Choose the Seagate hard drive.
  • Pick Partition that shows up at the top.
  • Pick the Current tab to choose the number of partitions from the drop-down menu (from 1 to 16).
  • In this scenario, let’s look at the two partitions. Pick the top window and name the first potential partition somehow. For instance, if you plan to leave this one for Windows OS, the title may sound the way this operating system does.
  • The next thing you need is the Format section. Choose MS-DOS (FAT) from the menu.
  • It is important to decide on the number of gigabytes you wish to store for the first partition in the Size field.
  • Then, pick another window for the second partition respectively.
  • The Name field requires a name (in this example, let it be Macintosh as you might want to leave partition2 for Mac OS X).
  • Pick Mac OS Extended (Journaled) from the appearing menu.
  • Now, it is time to decide how much space you wish to reserve for this partition.
  • Pick Options to choose PC Partition Scheme to activate a partition for usage on Windows device. Pick Master Boot Record.
  • The last thing to do is press the Apple button.

Here you go! Hopefully, you found the answers in this post. Try to partition your external hard drive now.