Seeking suggestions for free disk mappers like DaisyDisk

If you're looking for a free alternative to DaisyDisk for your Mac, there are several excellent options that can help you visualize disk usage and identify large files.

Option 1: GrandPerspective (Recommended)

GrandPerspective is one of the best free alternatives.

• Uses a visual "treemap" to display disk usage.
• Quickly identifies the largest files and folders.
• Lightweight and easy to use.
• Ideal if you want functionality similar to DaisyDisk.

Option 2: Disk Inventory X

Disk Inventory X provides a graphical map of your storage.

• Free and open source.
• Displays large files using a treemap.
• Useful for finding space-consuming folders.

Option 3: OmniDiskSweeper

OmniDiskSweeper takes a different approach.

• Lists files and folders by size instead of using graphics.
• Very fast.
• Great if you prefer a simple, sortable list.

Option 4: ncdu (Terminal)

If you're comfortable using Terminal, ncdu is an excellent free tool.

• Extremely fast.
• Interactive.
• Ideal for advanced users who don't need a graphical interface.

Option 5: Finder Storage Management

macOS also includes built-in storage tools.

Go to:

Apple menu > System Settings > General > Storage

This won't provide a visual disk map like DaisyDisk, but it can help identify large files, applications, and storage recommendations.

Recommended choice

If your goal is to replace DaisyDisk as closely as possible, I recommend:

1. GrandPerspective – Best overall free graphical alternative.
2. OmniDiskSweeper – Best for quickly locating large files in a list.
3. Disk Inventory X – Good if you prefer another treemap-style visualization.

These tools are free and can effectively help you locate files and folders consuming large amounts of disk space on your Mac.

Omni Disk Sweeper

https://www.omnigroup.com/more

Disk Inventory X

https://www.derlien.com

Grand Perspective

https://grandperspectiv.sourceforge.net

Grand Perspective

https://grandperspectiv.sourceforge.net/

If your ( @ weeklycod ) goal is to see the actual free disk space available on your SSD, Disk Utility is currently one of the most reliable places to check. 

You can also open Terminal and run df -h /

The "Avail" column will show the real amount of available filesystem space.

Above Terminal Command output

Disk Utilities Screen Shot

Most of the tools needed to see Used versus Free Space are actually already available without the need for Add-On application that make pretty representation of what is already available

It just means making a concerted effort on the part of the user to Learn what and where they are

I use OmniDiskSweeper as well for the occasional "spring cleaning" and monitoring when I see some unusual increase in disk usage. I find it just as easy to drill down through hierarchies as it is to drill down through a pie/wheel chart.

weeklycod wrote:

suggestion for free disk mapper like DaisyDisk

IMHO those pie chart and blotters are not as easy to read as OmniDiskSweeper.

https://www.omnigroup.com/more/

DaisyDisk only costs $9.99 USD on the developer's Web site, or in the App Store – and that's a one-time purchase fee, not a recurring "subscription" (rental) one.

Software developers need to eat, too – and while I have respect for those who make things like Linux, LibreOffice, and Firefox available for free, you really ought to be willing to pay $10 for a well-designed application if you want it.

If you are looking for what is hogging up disk space, there are only 2 places you should even mess with. Your user folder and Applications.

Unless you know exactly what you are doing, deleting items anywhere else can easily cripple or brick your system requiring a re-install of the OS or worse, a complete wipe of the computer and re-install.

Owl-53 wrote:

You can also open Terminal and run df -h /

It just means making a concerted effort on the part of the user to Learn what and where they are

if you use a capital "H" the output will be in GB not Gi to keep the confusion to a minimum...

ex. copy & paste:

df -H

leroydouglas wrote:

Owl-53 wrote:

You can also open Terminal and run df -h /

It just means making a concerted effort on the part of the user to Learn what and where they are

if you use a capital "H" the output will be in GB not Gi to keep the confusion to a minimum...

ex. copy & paste:

df -H

Noted 👍

Thanks for that enlightenment Kilted Tim.

I have just woken up to an email claiming my missing post has received an upvote. So I naturally assumed the post had been reinstated but on opening my browser I find it is still missing together with yours.

Incidentally why were some posts deleted as I didn't spot anything offensive, controversial or off-topic?

KiltedTim wrote:

If you're going to copy and paste from AI, at least give the AI credit.

Perhaps you can assist here 🤞

I decided to investigate the below Option 4: ncdu ( terminal) for the " Entity " who suggested this

From what I can find, it is normally installed as part of macOS Tahoe

Though, to avail oneself of this, it would require installing Homebrew

Not something a " novice " would what to enter into

That, in and of itself, seems, almost and bordering on dangerous advise

Owl-53 wrote:

KiltedTim wrote:

If you're going to copy and paste from AI, at least give the AI credit.

Perhaps you can assist here 🤞

I decided to investigate the below Option 4: ncdu ( terminal) for the " Entity " who suggested this

From what I can find, it is normally installed as part of macOS Tahoe

Though, to avail oneself of this, it would require installing Homebrew

Not something a " novice " would what to enter into

That, in and of itself, seems, almost and bordering on dangerous advise

Correction and should read

" From what I can find, it is NOT normally installed as part of macOS Tahoe "

woodmeister50 wrote:

I use OmniDiskSweeper as well for the occasional "spring cleaning" and monitoring when I see some unusual increase in disk usage.

Yea' I fire it up once or twice a year.

I find it just as easy to drill down through hierarchies as it is to drill down through a pie/wheel chart.

I keep a pretty tight ship and very rarely find something that I didn't already know about.

I don't know what is happening in this thread but there are several posts missing including one (or two?) of mine.

Has anyone else noticed?