How to get the macOS (OS X) installer

Updated : Sep 05, 2021
Jul/1/2021 Updated
Updated how to get Mac OS X 10.6 Lion and 10.7 Mountain Lion.
(The dmg file can now be downloaded.)
Nov./17/2020 Updated
Added how to get macOS 11.0 Big Sur.

I have summarized how to obtain the installer for each version of macOS (OS X) so far.

OS X 10.7 Lion and later can still be downloaded / purchased from Apple today (January 2020).

Also, after getting the installer, I think that you often create a USB memory for installation, but the procedure is explained in the following separate article.

Make a USB flash memory for macOS installation in "Terminal" of Mac
I will show you how to create a USB flash memory for installation for all versions of macOS (OS X) after 10.7 Lion. Here, I will explain in detail the procedure using the "Terminal" of the standard Mac application using illustrations.

 

About OS support status by Mac model

Before you get the OS, make sure your Mac is compatible.

If it is not supported, an error will occur during installation, or even if it is installed, it will not start.

The correspondence status is summarized in the following article, so please refer to it.

Mac model OS compatibility table
A list of compatible macOS (OS X) versions is posted for each Mac model. The OS cannot be installed or booted for the unsupported version.

 

List of acquisition methods by OS version

You can jump to each explanation by clicking ◯ in the list below.

OS version App Store dmg mas Online order
11.0 Big Sur × × ×
10.15 Catalina × × ×
10.14 Mojave × × ×
10.13 High Sierra × × ×
10.12 Sierra × × ×
10.11 El Capitan × × ×
10.10 Yosemite × ×
10.9 Mavericks × × ×
10.8 Mountain Lion ×
10.7 Lion ×
  • App Store:Apple’s official app distribution app “Mac App Store”
  • dmg:Download the dmg file from the official Apple website
  • mas:”Mas” command that can download the application from Apple official website
  • Online order:Online order from Apple official website

 

Download from “Mac App Store”

▶ You can download it from the App Store by clicking the link below.

 

macOS 11.0 Big Sur

macOS 10.15 Catalina

macOS 10.14 Mojave

macOS 10.13 High Sierra

 

▶ As you proceed with the download, you will proceed to the OS installation screen as it is, so to finish with just the download, exit the OS installation screen from the menu.

 

macOS 10.15 Catalina installer

 

▶ Then, if you look inside the “Applications” folder in the Finder, you can see that the installer is saved.

macOS 10.15 Catalina installer

 

▶ Also, after getting the installer, I think that you often create a USB memory for installation, but the procedure is explained in the following separate article.

Make a USB flash memory for macOS installation in "Terminal" of Mac
I will show you how to create a USB flash memory for installation for all versions of macOS (OS X) after 10.7 Lion. Here, I will explain in detail the procedure using the "Terminal" of the standard Mac application using illustrations.

 

Download the dmg file

▶ You can download it from Apple’s site by clicking the link below.

If clicking the link doesn’t work, right-click the link and try “Save Link As”.

 

macOS 10.12 Sierra

macOS 10.11 El Capitan

OS X 10.10 Yosemite

OS X 10.8 Mountain Lion

OS X 10.9 Lion

 

▶ Double-click the downloaded dmg file to create the “instalOS.pkg” file as shown below.

Then double-click it and follow the on-screen instructions to install it.

OS X 10.12 Sierra

 

▶ When the installation is complete, you can see that the installer is saved by looking inside the “Applications” folder in the Finder.

macOS 10.12 Sierra installer

 

▶ Also, after getting the installer, I think that you often create a USB memory for installation, but the procedure is explained in the following separate article.

Make a USB flash memory for macOS installation in "Terminal" of Mac
I will show you how to create a USB flash memory for installation for all versions of macOS (OS X) after 10.7 Lion. Here, I will explain in detail the procedure using the "Terminal" of the standard Mac application using illustrations.

 

“Mas” command that can download installer

The “mas command” is a command for downloading an app from the “terminal” of your Mac.

It cannot be used in the standard state of Mac, it is necessary to install multiple apps, and the procedure is complicated, so please refer to another article.

OS X 10.9 Mavericksのインストーラーを入手する方法
このページでは、Macで「masコマンド」というものを使って、10.9 Mavericksのインストーラーを入手する方法を、図解を使って詳しく説明します。 10.9 Mavericksだけは、他のバージョンのようにApp Storeや直リンクでダウンロードができません。

 

Also, after getting the installer, I think that you often create a USB memory for installation, but the procedure is explained in the following separate article.

Make a USB flash memory for macOS installation in "Terminal" of Mac
I will show you how to create a USB flash memory for installation for all versions of macOS (OS X) after 10.7 Lion. Here, I will explain in detail the procedure using the "Terminal" of the standard Mac application using illustrations.

 

Online order

The media is a USB flash memory.

アップル公式のOS X インストールUSBメモリ

You can order online from the following Apple site.

OS X 10.8 Mountain Lion

OS X Mountain Lion
OS X Mountain Lion is available now as a download from the Mac App Store. Just click the Mac App Store icon in your dock, purchase Mountain Lion, and follow the...

Mac OS X 10.7 Lion

OS X Lion (10.7)
If you need to purchase Mac OS X 10.7 Lion, you may order it from this page. The most current version of OS X is OS X 10.9 Mavericks. To learn more, please cli...

 

Reference information

 

This is the end of the article on this page.

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