Mounting an ISO file means treating it like a disc drive your computer can read

An ISO file is a single file that contains an exact copy of a disc — a CD, DVD, or Blu-ray. When you mount it, your operating system opens that file and makes it behave as if you had inserted the physical disc into a drive. You can then read the files inside, run installers, or play the disc's contents without owning the actual disc or a disc drive.

The process differs depending on whether you use Windows, Mac, or Linux, and each system has a built-in method that requires no extra software. Some people also use third-party tools for additional features, but the native options work for most situations.

Key Takeaways

  • Windows 10 and later can mount ISO files by right-clicking them and selecting "Mount," which assigns them a virtual drive letter.
  • Mac users can double-click an ISO file to mount it automatically, and it appears on the desktop like a connected drive.
  • Linux users typically use the command line with the mount command, though some desktop environments offer graphical tools.
  • Once mounted, you access the ISO's contents through your file manager just like any other drive or folder.
  • Unmounting (ejecting) the ISO removes the virtual drive and frees up the file for moving or deleting.

Mounting an ISO on Windows 10 and Windows 11

Windows 10 and later versions include built-in ISO mounting. Right-click the ISO file in File Explorer, then select "Mount" from the context menu. Windows assigns the ISO a virtual drive letter — usually the next available letter after your physical drives — and the contents appear in File Explorer as if you had inserted a disc.

You can see the mounted ISO in the left sidebar under "This PC" with its assigned drive letter. Open it like any folder to view or run the files inside. If the ISO contains an installer, you can launch it directly from the mounted drive. When you finish, right-click the mounted drive in File Explorer and select "Eject" to unmount it.

If you do not see the "Mount" option, your Windows version may be older than Windows 10. In that case, you will need third-party software such as WinRAR, 7-Zip, or Daemon Tools to mount the ISO.

Mounting an ISO on Mac

Mac systems mount ISO files automatically when you double-click them. The ISO appears on your desktop as a disc icon and also shows up in Finder's sidebar. You can then open it and access its contents the same way you would a connected external drive.

If double-clicking does not work, you can also right-click the ISO file, select "Open With," and choose "Disk Utility." Disk Utility will mount the ISO and show it in the list of mounted volumes. To unmount the ISO, drag its icon to the Trash, or select it in Disk Utility and click the "Eject" button.

Mounting an ISO on Linux

Linux requires a bit more manual work, but the process is straightforward. Open a terminal and use the mount command with the path to your ISO file and a mount point — a folder where the ISO's contents will appear. A typical command looks like: sudo mount -o loop /path/to/file.iso /mnt/iso. You will need administrator (sudo) privileges to run this command.

The mount point folder must exist before you run the command. If it does not, create it first with mkdir /mnt/iso. After mounting, navigate to that folder in your file manager or terminal to access the ISO's contents. To unmount, use sudo umount /mnt/iso.

Some Linux desktop environments like GNOME and KDE offer graphical tools that let you right-click an ISO and mount it without using the terminal. Check your system's file manager for this option before opening a terminal.

What to do if mounting fails

If the ISO does not mount, the file may be corrupted. Try downloading it again from the source. Verify the file's integrity if the source provides a checksum or hash value — tools like HashTab (Windows) or built-in terminal commands can confirm the file matches what was originally provided.

On Windows, if you see an error about the file being in use, close any programs that might be accessing it and try again. On Mac, if Disk Utility shows an error, try restarting your computer. On Linux, make sure the mount point folder exists and that you have permission to write to it.

If the ISO file itself is damaged beyond repair, you will need to obtain a fresh copy from the original source.

Using third-party software for additional features

While built-in mounting works for most cases, third-party tools offer extra features. Daemon Tools (Windows and Mac) lets you mount multiple ISOs at once and create virtual drives that persist across restarts. WinRAR and 7-Zip (Windows) can also mount ISOs and let you extract individual files without mounting the entire disc.

These tools are useful if you regularly work with ISO files or need to mount many at once. For occasional use, the native mounting options in your operating system are sufficient and require no installation.

Frequently Asked Questions

Can I edit files inside a mounted ISO?

No. Mounted ISOs are read-only — you cannot modify, delete, or add files to them. If you need to edit the contents, extract the files to a regular folder first, make your changes, and then create a new ISO if needed.

Do I need to unmount an ISO before moving or deleting it?

Yes. On Windows and Mac, unmount the ISO first by ejecting it. On Linux, use the umount command. Once unmounted, the file is no longer in use and you can move, delete, or copy it freely.

What if my computer does not have a disc drive?

Mounting an ISO is the main reason to use one when you do not have a physical disc drive. It lets you access the disc's contents without buying an external drive or burning the ISO to a blank disc.

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 — an external drive, USB stick, or network location. The mounting process is the same regardless of where the file is located.