How to Mount an ISO File on Windows, Mac, or Linux

What mounting an ISO file means and why you'd do it

Mounting an ISO file makes your computer treat it like a physical disc — a CD, DVD, or USB drive — without needing the actual hardware. When you mount an ISO, your operating system assigns it a drive letter (on Windows) or a mount point (on Mac and Linux), and you can then open files inside it, run installers, or copy data to your hard drive, exactly as if you'd inserted a real disc.

ISO files are compressed archives that contain everything from a physical disc: operating systems, software installers, game discs, or backup images. Mounting is faster and more convenient than burning the ISO to a physical disc, and it lets you work with multiple ISO files at once without swapping discs.

Key Takeaways

Windows 10 and later can mount ISO files natively by right-clicking the file and selecting "Mount" — no additional software needed.
Mac users can double-click an ISO file to mount it automatically, and it will appear on the desktop like any other disc.
Linux users typically use the command line with mount or a file manager's built-in mount feature, depending on their distribution.
Once mounted, the ISO behaves like a real drive: you can browse files, run installers, and copy data until you unmount it.
Unmounting (ejecting) the ISO safely closes the connection and frees up the virtual drive letter or mount point.

Mounting an ISO on Windows 10 and Windows 11

Windows 10 and later versions include built-in ISO mounting, so you do not need third-party software. Locate your ISO file in File Explorer, right-click it, and select Mount. Windows will assign the ISO a drive letter — usually the next available one after your existing drives — and it will appear in File Explorer under "This PC" just like a USB drive or external hard drive.

Once mounted, you can open the ISO's contents by double-clicking the drive letter. If the ISO contains an installer (such as Windows itself or application software), you can run the setup file directly. If it contains data files, you can copy them to your hard drive by dragging and dropping or using copy and paste.

To unmount the ISO when you are finished, right-click the drive letter in File Explorer and select Eject. The virtual drive will disappear, and the drive letter becomes available again. You can mount the same ISO again at any time without any loss of data.

Mounting an ISO on Mac

macOS handles ISO mounting automatically. Locate the ISO file in Finder and double-click it. The system will mount the ISO and display it on your desktop as a disc icon, usually labeled with the name of the ISO file. You can then open the disc icon to browse its contents, run installers, or copy files to your Applications folder or elsewhere on your Mac.

If the ISO does not mount automatically, you can also right-click the file, select Open With, and choose Disk Utility. In Disk Utility, select the ISO file and click the Mount button at the top of the window.

To unmount the ISO, drag the disc icon to the Trash, or right-click it and select Eject. The disc will disappear from your desktop, and the ISO file itself remains on your hard drive unchanged.

Mounting an ISO on Linux

Linux offers several methods depending on your distribution and desktop environment. The command-line approach works on any Linux system: open a terminal, create a mount point (an empty folder where the ISO will appear), and use the mount command. For example, to mount an ISO at a folder called /mnt/iso, you would type:

sudo mount -o loop /path/to/file.iso /mnt/iso

Replace /path/to/file.iso with the actual location of your ISO file. The -o loop option tells Linux to treat the ISO as a loopback device (a virtual disc). After mounting, you can navigate to /mnt/iso in your file manager and access the contents. To unmount, use sudo umount /mnt/iso.

Many Linux desktop environments (such as GNOME and KDE) also allow you to right-click an ISO file in the file manager and select Mount or Open With Archive Manager. The exact wording varies by distribution, but the result is the same: the ISO becomes accessible as a virtual drive.

What to do if mounting fails

If your operating system does not recognize the ISO file or mounting produces an error, the file may be corrupted. Verify the ISO by checking its file size against the original source — if it is significantly smaller than expected, the download may have been interrupted. Re-download the ISO from the original source and try mounting again.

On Windows, if you see a "Windows cannot open this file" message, your system may not recognize the file type. Right-click the ISO, select Open With, and choose File Explorer or Windows Explorer explicitly. If that does not work, the ISO file extension may be incorrect; verify that the filename ends in .iso and not something else like .img or .bin.

On Mac, if double-clicking does not work, try dragging the ISO directly onto Disk Utility (found in Applications > Utilities). On Linux, ensure you have used the correct file path and that you have permission to access the file. If you receive a "permission denied" error, you may need to use sudo or adjust file permissions.

Mounting ISO files that contain bootable operating systems

If your ISO contains a bootable operating system (such as Windows, Linux, or macOS), mounting it allows you to access the installation files and copy them to a USB drive for installation on another computer. However, mounting does not make the ISO bootable on your current machine — it simply lets you read the files inside.

To create a bootable USB drive from an ISO, you will need separate software such as Rufus (Windows), Etcher (cross-platform), or the Disk Utility's Restore feature (Mac). These tools write the ISO to a USB drive in a way that makes the drive itself bootable, which is different from mounting.

Frequently Asked Questions

Can I edit files inside a mounted ISO?

No. When you mount an ISO, it is read-only by default — you can open and copy files, but you cannot modify or delete them directly. If you need to edit files, copy them to your hard drive first, make your changes, and then create a new ISO if needed using ISO creation software.

Do I need to unmount an ISO before shutting down my computer?

It is good practice to unmount (eject) the ISO before shutting down, but most operating systems will do this automatically. However, unmounting manually ensures there are no conflicts and keeps your system clean.

Can I mount multiple ISO files at the same time?

Yes. Each ISO will receive its own drive letter (Windows) or mount point (Mac and Linux), so you can work with several ISOs simultaneously. This is one of the main advantages of mounting over burning physical discs.

What is the difference between mounting and extracting an ISO?

Mounting creates a virtual drive that behaves like a real disc; the ISO file itself is not changed. Extracting unpacks the ISO's contents into a folder on your hard drive, which takes up additional space but gives you permanent access to the files without keeping the ISO mounted.

Can I mount an ISO from an external hard drive or USB stick?

Yes. The ISO file can be stored anywhere your computer can read — your hard drive, external drive, USB stick, or network location. The mounting process is the same regardless of where the ISO is located.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.