# Mac OS X Lion 10.7 Download: DMG, Installer, and USB

## How to download Mac OS X Lion?

**Quick Answer:**

1️⃣[Download the official DMG file from Apple.](#mac-os-x-lion-dmg-download)\(Apple still provides the Mac OS X Lion DMG file. If you want to install Lion on a Mac, use the official DMG file.\)

2️⃣[Download the Mac OS X Lion ISO file.](#mac-os-x-lion-iso-download)\(Used for virtual machines and testing; needs to be verified before using.\)

3️⃣[Download the installer app from Internet Archive](#mac-os-x-lion-installer-download). \(Suitable for bootable USB creation.\)

To**safely download the Mac OS X Lion DMG/ISO full installer or quickly create a Lion bootable USB installer without complex commands**, get[iBoysoft](https://iboysoft.com/)DiskGeeker.

![Lion macOS download](https://iboysoft.com/images/en-howto/lion-macos-download/lion-macos-download.jpg)

> I need a Lion installer to create a bootable USB to start an old iMac that was erased. But it's virtually impossible because the Mac App Store no longer provides it and I can't convert the occasional.pkg file I get into an installer. P.S. I can't use Recovery Mode to reinstall the OS.

Similar to the post above, you may also want to download Mac OS X Lion 10.7 for an old Mac that no longer supports newer Mac OS versions. The good news is that we'll provide the direct links to**download Mac OS X Lion**installer, DMG, or ISO image in this post.

## Which Lion file should you download?

If you're uncertain about which Lion installer to download, the following table gives you the answer:

| **Format** | **Suitable users** | **Source trust** | **Creating bootable USB** | **Risk** |
| --- | --- | --- | --- | --- |
| **Mac OS X Lion DMG** | Users who need a disk image file for manual installation, system restoration, or bootable media creation | Depends on the source. Reliable when obtained from Apple or a trusted provider | Yes \(on macOS\) | Low \- Medium: official source is safe, but modified or corrupted DMG files from third\-party sources may cause installation issues |
| **Mac OS X Lion ISO** | Users creating bootable media on Windows or installing Lion on virtual machines | Depends on the source. ISO files online are often repackaged by third parties | Yes \(on Windows\) | Low \- High: unofficial or altered ISO files are worrying, but safe sources like iBoysoft DiskGeeker are reliable |
| **Mac OS X Lion Installer App** | Users who want to run the installer directly to install Mac OS X Lion | Highest when downloaded directly from Apple | Yes \(on macOS\) | Low \- Medium: app installers from third\-party sources are risky, but the app installer extracted from the official DMG file is safe |

## Check Mac OS X Lion compatibility before downloading

Before downloading Mac OS X Lion, ensure your Mac meets the following requirements:

| **Requirement** | **Mac OS X Lion Compatibility** |
| --- | --- |
| Processor | Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor |
| Memory \(RAM\) | 2 GB minimum |
| Storage space | At least 7 GB of available storage |
| Current OS requirement | OS X Snow Leopard v10.6.6 or later \(v10.6.8 recommended\) |
| Internet connection | Required for downloading |
| Supported Mac models | Mid\-2007 or newer compatible Mac models generally support Lion |
| Architecture | Intel\-based Macs only \(PowerPC Macs are not supported\) |

To sum up, Mac OS X Lion is better suited to older Intel Macs than to newer Mac models.

## Official Mac OS X Lion DMG download

The Mac OS X Lion DMG file is essentially a disk image containing the installation files needed to install or upgrade to Mac OS X Lion. If you want to reinstall or upgrade your Mac to Mac OS X Lion, the DMG file is the perfect match.

The official Mac OS X Lion DMG file is still available on Apple's server. You can copy the link below and open Safari to download it.

| **Official Mac OS X Lion Download Card ✅** |
| --- |
| **Apple Official Source:**[Official Mac OS X Lion DMG Link from Apple](https://updates.cdn-apple.com/2021/macos/041-7683-20210614-E610947E-C7CE-46EB-8860-D26D71F0D3EA/InstallMacOSX.dmg) |
| **File Name:**InstallMacOSX.dmg |
| **File Size:**4.4GB |

![Mac OS X Lion DMG download](https://iboysoft.com/images/en-howto/lion-macos-download/mac-os-x-lion-dmg-download.jpg)

Once it finishes downloading, you can extract the installer and jump to the last part to learn how to create the bootable Lion USB installer on a Mac or follow this guide to make bootable Lion USB media on Windows:[How to Create macOS Bootable USB from Windows 10/11](https://iboysoft.com/howto/create-macos-bootable-usb-from-windows.html).

### How to get the Lion installer app from the DMG?

To get the Lion installer from the disk image, follow the steps below: \(Note that you must have a Mac that's compatible with Mac OS X Lion.\)

1. Double\-click the Mac OS X Lion DMG file to open it.
2. Then double\-click the .pkg file within and follow the onscreen instructions to save the installer to your Applications folder.
3. Open the Applications folder to check whether the Lion installer exists.

Share to help others download Mac OS X 10.7 Lion DMG for free\!

Tips:

To learn different ways to download and install Mac OS X Lion:[Mac Operating System Download & Install Guide](https://iboysoft.com/howto/how-to-download-and-install-macos.html)

To download other macOS installers:[Free Download Latest macOS, OS X, & Mac OS X Installers](https://iboysoft.com/howto/download-macos-installer.html)

To download more old Mac OS versions:[Download Old Mac OS Full Installers](https://iboysoft.com/howto/download-old-mac-os.html)

## Mac OS X Lion ISO download

If you plan to install Mac OS X Lion on a Windows PC, you'll need the ISO file instead. It's not the official macOS distribution format, but a disk image working with virtual machines like VirtualBox, VMware, or Parallels Desktop. Therefore, you can only download it from a third\-party source.

User\-uploaded Mac OS X Lion ISO files online are usually unofficial conversions or repackaged versions, which cannot be verified for integrity. If you want to download OS X 10.7 Lion safely, we recommend you use iBoysoft DiskGeeker.

This tool is developed for both macOS and Windows users. The Windows version offers the ISO and DMG files for Mac OS X Lion and other releases, while the macOS version only provides the DMG file. Both versions allow you to create a bootable USB installer for OS X Lion effectively.

Here's**how to download the Mac OS X Lion ISO image**:

Step 1: Free download and launch iBoysoft DiskGeeker.

Step 2: Click**Download and create boot disk**\>**Download macOS system image**.

![Clicking the Download macOS system image button](https://iboysoft.com/images/en-howto/lion-macos-download/download-macos-images.jpg)

Step 3: Choose**OS X 10.7 Lion**, click**Get**, then choose the**.iso**format.

![Choosing to download Mac OS X Lion ISO file](https://iboysoft.com/images/en-howto/lion-macos-download/download-os-x-lion-iso.jpg)

Step 4: Save the image to a preferred location.

![Choosing where to save the Mac OS X Lion image](https://iboysoft.com/images/en-howto/lion-macos-download/choose-where-to-save-lion-iso.jpg)

If you'd rather download the ISO file via direct links from online resources, do it at your own risk.

[Mac OS X Lion ISO download \(Mediafire\)](https://techrechard.com/download-macos-x-mountain-lion-iso-image-for-virtualbox-and-vmware/)\#third\-party source

[Mac OS X Lion ISO download \(Google Drive\)](https://drive.google.com/file/d/11h9Z866Cg_lvkIy9T9ljjMKClzsAf89u/view?usp=sharing)\#third\-party source

*Credits go to techrechard.com.*

## Mac OS X Lion installer app download

There aren't many resources that provide the Lion installer in the.app extension. Fortunately, the Internet Archive has a copy archived. It's a 3.5GB ZIP file named Install Mac OS X Lion.app.zip.

![Mac OS X Lion installer download](https://iboysoft.com/images/en-howto/lion-macos-download/mac-os-x-lion-installer-download.jpg)

[Mac OS X Lion installer download](https://archive.org/download/install-mac-os-x-lion.app/Install%20Mac%20OS%20X%20Lion.app.zip)\#third\-party source

You can download it, unzip the file to extract the application installer, and then use it to create a bootable USB drive for Mac OS X Lion directly.

## How to create a Mac OS X Lion Bootable USB?

Tips:Remember that we mentioned you can easily create a bootable USB installer for OS X Lion with[iBoysoft DiskGeeker for Mac](https://iboysoft.com/disk-utility/)? Here are the steps. This method guarantees you a working Mac OS X Lion bootable installer on an Intel\-based or Apple Silicon Mac in a few clicks.

Step 1: Download and install iBoysoft DiskGeeker.

Step 2: Click**Create boot disk**from the left "Shortcut" section.

![Choose Create boot disk to start creating Lion bootable USB](https://iboysoft.com/images/product-ibd/version-420/choose-create-boot-disk.jpg)

Step 3: Choose your external drive and click Select \> Continue.

Step 4: Select**OS X 10.7 Lion**and click**Create boot disk**.

![Create lion bootable USB installer](https://iboysoft.com/images/en-howto/lion-macos-download/create-lion-bootable-usb-installer.jpg)

Step 5: Wait while the bootable USB installer is being created.

If you want to create a Mac OS X bootable USB manually, try the steps below:

Tips:Apple's official media creation guide shows users how to create bootable USB installers via Terminal, but it omits Lion because the createinstallmedia tool didn't exist at the time. It was first introduced with OS X 10.9 Mavericks. To make a bootable USB for Mac OS X Lion manually, you have to do it the old\-fashioned way by extracting the disk image and restoring it to your external drive.

1. Right\-click on the **Install Mac OS X Lion.app** and choose **Show Package Contents** .
2. Go to Contents \> SharedSupport.
3. Look for a file named **InstallESD.dmg** and double\-click it to mount it on your desktop.
4. Connect a USB flash drive with at least 8 GB of free storage to your Mac.
5. Open Disk Utility.
6. Click View \> Show All Devices.
7. Select the physical disk of your USB and click Erase. \(This removes all data on the drive.\) ![Format external drive for creating bootable Lion USB installer](https://iboysoft.com/images/en-howto/lion-macos-download/format-external-usb-for-lion-bootable-drive.jpg)
8. Name it MyVolume.
9. Choose Mac OS Extended \(Journaled\) as the format.
10. Keep GUID Partition Map.
11. Click Erase.

After that, you must restore the InstallESD.dmg file to the formatted USB drive.

**If you are on an older macOS version \(like High Sierra or earlier\)**: In Disk Utility, select your newly formatted USB partition, click the**Restore**tab/button, and set the source as the mounted Mac OS X Install ESD image, then click**Restore**.

**If you are trying to make this on a modern Mac**: Modern versions of Disk Utility often block restoring old Mac OS X images this way. Instead, you can force it via Terminal using the Apple Software Restore tool:

sudo asr restore \-\-source /Volumes/Mac\\ OS\\ X\\ Install\\ ESD \-\-target /Volumes/MyVolume \-\-erase \-\-noverify

Enter your administrator password and hit Enter to execute the command. Wait until the bootable media is ready. Then you can hold Option at startup to[boot the Mac from the external drive](https://iboysoft.com/howto/boot-mac-from-external-drive.html)to install macOS.

Also read:

[Free Download Mac OS X 10.8 Mountain Lion Full Installer, DMG & ISO](https://iboysoft.com/howto/mac-os-mountain-lion-download.html)

## Common problems after creating bootable Lion USB

Getting the legacy Mac OS X Lion installer to play nice with modern storage formats or hardware can be a bit of a headache. If you hit a wall, look for your specific symptom below.

### 1. The Bootable USB Doesn't Show Up in the Startup Disk Selection Menu

You plug in your finished USB drive, restart your Mac while holding down the Option \(Alt\) key, but the installer drive does not appear in the boot menu.

**Why it happens:**This usually happens if the drive's partition scheme was set incorrectly during formatting \(e.g., left as MBR instead of GUID\), or if modern macOS security settings block the disk from mounting properly during the creation process, leading to a silent failure.

**The Fix:**You need to re\-verify the partition scheme. Plug the USB back into a running Mac, open Disk Utility, and select the parent device of your USB drive. Check its information at the bottom of the window: it must say GUID Partition Map. If it says Master Boot Record \(MBR\), you will need to re\-erase the entire top\-level drive using the correct settings \(see step 5\) and restore the installer image again.

### 2. The Mac Won't Boot From the USB

The USB installer appears as a choice in the startup menu, but selecting it leads to a prohibited symbol \(a circle with a line through it\) or a crash.

**Why it happens:**This is usually a hardware compatibility or certificate issue. Lion cannot boot on Macs built after late 2012 because their hardware lacks the necessary legacy drivers. Alternatively, the installer's built\-in security certificate expired years ago.

**The Fix:**If your Mac is hardware\-compatible but refuses to boot, disconnect it from the internet, boot into your recovery environment, open Terminal, and roll back your system clock to 2012 with this command: date 0101000012 \(January 1, 2012\). This tricks the installer into thinking its certificate is still valid.

### 3. Terminal Command Fails

If you tried the asr restore command, it says "Operation not permitted" or "Could not validate source."

**Why it happens:**For the asr restore failure, modern macOS versions have tight security protocols \(like System Integrity Protection\) that block low\-level disk modifications.

**The Fix:**Double\-check your spelling and pathing. If you get a permission error on a modern Mac, make sure Terminal has Full Disk Access enabled in your System Settings \> Privacy & Security.

## FAQs

AApple removed OS X Lion \(10.7\) and other legacy operating systems from the public App Store search results years ago to prevent users from accidentally downgrading modern Macs.

ANot with the usual methods, as the M\-series Macs run on ARM architecture, and their version of Disk Utility blocks the old replication commands \(asr\) needed to flash Lion's legacy file system. However, iBoysoft DiskGeeker provides the functionality to build one for you.

ABecause the createinstallmedia tool inside macOS installers did not exist when Lion was released in 2011. Apple didn't introduce that Terminal command until OS X Mavericks \(10.9\).

AYou must format it to Mac OS Extended \(Journaled\) with a GUID Partition Map.