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#Mac os lion download usb how to
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The Mac will then display all the startup disks available. Just connect the USB disk and press the Option/Alt Key when you hear the boot sound.

#Mac os lion download usb install

Clean installing or restoring a Mac offline with USB pen driveĪs said earlier, you could use the macOS USB installer to do a clean install or restore it upon a boot failure. If you have a macOS DMG, you can create bootable USB disk from a Windows PC - use a software like TransMac for this purpose. But think about a situation when your only Mac stops to boot, and you don’t have USB installer or TimeMachine backup! Downloading MacOS DMG file might save you. This method is applicable when you have a Mac, and the internet recovery fails. What is the alternative if I don’t have usable Mac at the moment?

#Mac os lion download usb manual

Check the instructions on Apple website, the manual method to make macOS offline USB installer. Unfortunately, the above app is not compatible with macOS Big Sur 11 and above. Unmount and keep the USB installer to a safe place. When it completes you will find Install macOS Mojave (or High Sierra) mounted to your desktop as a USB disk.

Keep checking notifications tab for progress.

Don’t forget to provide your admin password when it prompts.

Ignore the warning message and proceed to Erase and Create macOS USB disk.

Pick the one you would like use as macOS USB installer.

The app will list all drives in your system.

Choose the third option ” An 8 GB USB Thumb drive.”

Next is setting the USB pen drive for creating the bootable installer.

Select “Use this Copy” if you would like to proceed with it.

The application will automatically detect the downloaded macOS as shown in the screenshot.

Run Disk Maker DMG installer and copy the app to the Applications.

The next step is to download full macOS installer from the App Store to your Applications folder.

I use an MacBook Pro with High Sierra.

For example, if you want make USB installer for macOS Catalina 10.15, download Disk Maker X 9.

Choose a version as per your requirement.

First, download a copy of Disk Maker from the official website.

For this you need a Mac and a USB pen drive of at least 8 GB space, and a third-party app called DiskMaker. Hence we discuss only about making macOS recovery installer on a USB disc. Most of the Macs these days don’t have DVD slots, and the installation through a disc is very slow. It is possible to create a backup macOS installer on a DVD or USB drive but later is the best choice.

#Mac os lion download usb how to

How to make a macOS bootable USB installer Double-click and open the InstallAssistant.PKG to save the “Install macOS Big Sur.app” to the Applications folder.Īpart from this, some older versions of macOS are available for direct download from Apple ( Sierra, EL Capitan, Yosemite) in DMG format. Because, for macOS Big Sur you get a full-size installer from Apple in PKG format. You don’t need to use the second script if your choice is macOS Big Sur. The script will build the offline installer and save it to the same folder. All you need is to drag and drop the downloaded macOS folder to the terminal window. For macOS versions up-to Big Sur, you need to use another script “ mand” in the main folder to join all the downloads and make the full macOS installer app. The OS gets downloaded as parts, PKGs, DMGs and other files. A new folder “macOS downloads” appears in the “ gibMacOS-master” as you provide a download option, and the OS starts downloading as you can see in the video. You can use this script to download macOS Big Sur (11.1), Catalina (10.15), Mojave (10.14), and High Sierra (10.13.6). When the list is ready choose a number as per your OS option and press the Return/Enter key. Wait for the script to fetch the macOS download catalogue from Apple. From the extracted folder, run the script called mand - it will open the Terminal as shown below. Hence, before anything, we will tell you how to download macOS offline installer directly from Apple to your Mac using a GitHub script.ĭownload the gibMacOS script from this link and extract it to your Mac. And you need to download a full-size macOS installer for making this disk. Installing macOS without internet requires a bootable USB disk. Having a macOS offline installer or a bootable USB disk is the only solution in such scenarios. But there are situations where you can’t download the OS from the Apple servers. Apple also provides an option for internet recovery of macOS if your computer fails to boot.

#Mac os lion download usb update

The online OS update is OK if you have stable broadband connectivity and enough bandwidth. Be it a clean install or upgrade, Mac App store require you connect to the internet to download whole installation files.

#Mac os lion download usb for mac

Customers get Software upgrades for Mac computers through the online app store ever since the release of macOS Lion.