Home Interests MacOS

How to partition a hard drive on macOS

One hard drive—many partitions.
howchoo   (434)
August 14, 2023
5 minutes


Posted in these interests:
apple • 16 guides
macos • 18 guides

Today we’re covering the easiest way to partition a hard drive on macOS. These steps will work on both internal hard drives and external devices like USB drives. Partitioning is useful for things like virtual machines or dual boot rigs. But it can also be a useful troubleshooting tool.

Partitioning involves splitting a hard drive into individually usable chunks. The capacity of the hard drive is split between the partitions, not shared. So a 100GB hard drive can make two 50GB partitions. But the split doesn’t have to be even. You can specify any amount you need. One partition can be 22Gb while the other is 78GB.

1 – Partition a hard drive using Disk Utility

Navigate to Applications > Utilities > Disk Utility. Or search for Disk Utility in Mac’s Spotlight Search.

When Disk Utility is open, select the hard drive you want to break into a partition on the left side of the window.

  • Click Partition from the top menu bar.
  • Select Add Volume to create a new partition.
  • Choose a size and name for your new partition.
  • Click Apply.

It may take a few minutes for the process to complete.

2 – Partition a hard drive using Terminal

Navigate to Applications > Utilities > Terminal.

Use the diskutil list command to see a list of drives connected to your computer. Take note of the disk name on the drive you want to partition.

This is the command to create a single partition:

diskutil partitionDisk /dev/disk2 GPT JHFS+ NewPartition 0b

Replace /dev/disk2 with the name of your hard drive. Replace JHFS+ with the formatting of your choice. Changing NewPartition will change the name of your new partition. Lastly, 0b represents the size of the new partition. Adjust this to create a specific partition size.

Here’s an example showing the creation of multiple 10GB partitions:

diskutil partitionDisk /dev/disk2 GPT JHFS+ Partition1 10g JHFS+ Partition2 10g

It may take a few minutes for the partition to be created. Congratulations! You’ve successfully split your hard drive.


How to Disable Local Time Machine Backups in macOS

howchoo   (434)
November 27, 2023

Your Mac has a “feature” that will put time machine backups on your local disk if your primary Time Machine drive isn’t available. I’m not sure the details about how often it writes to your local drive, but I don’t know that you can’t delete it easily. This short guide will show you how to

Continue Reading


 434 guides

Introducing Howchoo, an enigmatic author whose unique pen name reflects their boundless curiosity and limitless creativity. Mysterious and multifaceted, Howchoo has emerged as a captivating storyteller, leaving readers mesmerized by the uncharted realms they craft with their words. With an insatiable appetite for knowledge and a love for exploration, Howchoo's writing transcends conventional genres, blurring the lines between fantasy, science fiction, and the surreal. Their narratives are a kaleidoscope of ideas, weaving together intricate plots, unforgettable characters, and thought-provoking themes that challenge the boundaries of imagination.

Discover interesting things!

Explore Howchoo's most popular interests.