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

What mounting an ISO file means and why you need it

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 treats that file as if you had inserted the physical disc into a drive. The files inside become visible and usable without burning the ISO to an actual disc or extracting it first.

You mount ISO files when you want to install software, run a program, or access data without the original disc. It saves the cost of blank media and the time of burning. Once mounted, the ISO appears as a new drive letter (Windows), a volume (Mac), or a mount point (Linux) in your file manager.

The process differs by operating system, but all three methods are built into the OS — you do not need extra software to mount a standard ISO file.

Key Takeaways

Windows 10 and later can mount ISO files by right-clicking them and selecting "Mount," which assigns them a temporary drive letter.
Mac users can double-click an ISO file to mount it automatically, and it appears on the desktop and in Finder.
Linux requires the mount command in the terminal, along with a mount point directory and root or sudo access.
A mounted ISO stays active until you unmount it, eject it, or restart your computer — the file itself is not modified.
If your ISO file is corrupted or incomplete, mounting will fail or show errors when you try to open files inside it.

Mounting an ISO on Windows 10 and Windows 11

Windows 10 and later versions have built-in ISO mounting. Locate the ISO file in File Explorer, right-click it, and select Mount. Windows assigns it a drive letter (usually the next available one, like D: or E:) and opens File Explorer showing the contents. The mounted ISO appears in the left sidebar under "This PC" alongside your regular drives.

To unmount the ISO when you are done, right-click the drive letter in File Explorer and select Eject. The drive letter disappears, and the ISO file remains on your hard drive unchanged. If you need to mount the same ISO again later, repeat the right-click and Mount process.

If you are running Windows 7 or an older version, you will need third-party software like Virtual CloneDrive, Daemon Tools, or WinCDEmu. read and install one of these, then right-click the ISO and select the mount option from the context menu.

Mounting an ISO on Mac

macOS mounts ISO files automatically when you double-click them. The ISO appears as a volume on your desktop and in the Finder sidebar under "Locations." You can then open it like any folder, copy files from it, or run installers inside it.

To unmount the ISO, drag its desktop icon to the Trash, or right-click it in Finder and select Eject. The volume disappears, but the original ISO file stays in your Downloads folder or wherever you saved it. If the ISO does not mount when you double-click it, check that the file is not corrupted by trying to mount it again or verifying its checksum if the source provided one.

Mounting an ISO on Linux

Linux requires a terminal command to mount an ISO. First, create an empty directory that will serve as the mount point — a location where the ISO contents will appear. Open a terminal and run:

mkdir ~/mnt_iso

Then mount the ISO using the mount command. If your ISO is in your home directory and named install.iso, run:

sudo mount -o loop ~/install.iso ~/mnt_iso

The sudo prefix gives the command root access, which mounting requires. Enter your password when prompted. The ISO contents now appear in the ~/mnt_iso directory and are readable through your file manager or terminal.

To unmount, run sudo umount ~/mnt_iso. The directory remains but becomes empty again. You can delete the mount point directory afterward if you no longer need it, or leave it in place for future mounts.

What to do if the ISO will not mount

If mounting fails or shows an error, the ISO file is likely corrupted or incomplete. Try downloading it again from the original source. If you have a checksum (a string of letters and numbers provided by the source), verify it matches your downloaded file — this confirms the file arrived intact.

On Windows, if the Mount option does not appear in the right-click menu, your Windows version may be older than 10. Install a third-party tool instead. On Mac, if double-clicking does not work, try opening the ISO with Archive Utility or Disk Utility (found in Applications > Utilities). On Linux, make sure the mount point directory exists and that you have sudo access.

If the ISO mounts but files inside show errors or will not open, the ISO itself may be damaged. Contact the source where you downloaded it and request a fresh copy.

The difference between mounting and extracting an ISO

Mounting makes the ISO appear as a drive without changing the file. Extracting unpacks all the files inside the ISO into a regular folder on your hard drive. Mounting uses less disk space because the ISO stays as one file. Extracting takes more space but gives you permanent access to the files even if you delete the ISO later.

For installing software or running a program once, mounting is faster. For keeping files long-term or editing them, extracting is better. You can extract an ISO by right-clicking it and selecting "Extract All" (Windows) or using the Archive Utility (Mac), or by using the unzip or 7z command on Linux.

Mounting ISO files from external drives and USB devices

You can mount an ISO file stored on an external hard drive or USB stick the same way you mount one from your main drive. On Windows and Mac, the process is identical — right-click or double-click the ISO wherever it is located. On Linux, include the full path to the ISO in the mount command, for example:

sudo mount -o loop /media/usb_drive/install.iso ~/mnt_iso

Keep the external drive connected while the ISO is mounted. If you disconnect it, the mounted drive will become inaccessible, and you may see error messages in your file manager. Unmount the ISO before disconnecting the external device.

Frequently Asked Questions

Can I edit files inside a mounted ISO?

No. A mounted ISO is read-only — you can open and copy files from it, but you cannot modify or delete them. If you need to edit files, extract the ISO first, make your changes, and create a new ISO if needed. Some Linux tools allow read-write mounting, but this is not standard and can corrupt the ISO.

Does mounting an ISO use extra hard drive space?

No. Mounting does not copy the ISO contents to your drive — it only makes them visible. The ISO file itself takes up space, but mounting adds almost nothing. Extracting, by contrast, creates a full copy of all files, which doubles the space used.

What happens if I restart my computer while an ISO is mounted?

The ISO unmounts automatically when you restart. The file remains on your hard drive, and you can mount it again whenever you need it. No data is lost.

Can I mount multiple ISO files at the same time?

Yes. Each ISO gets its own drive letter (Windows), volume (Mac), or mount point (Linux). You can mount as many as your system has resources for, though mounting many at once may slow your computer slightly.

Why would I mount an ISO instead of just extracting it?

Mounting is faster and uses less disk space. It is ideal for running an installer once or accessing files temporarily. Extracting is better if you need permanent access to the files or want to edit them.

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.