Go to the Mac App Store on your eligible Mac.
Follow these final steps to install the OS on your target machine: Shut down the Mac you want to update. Insert the bootable USB installer into the device. Turn on the Mac while holding down the key. Release the key when the Startup Manager screen appears.
This file is generally a .pkg or .dmg that updates a previous version. 2. The Mac App Store Method (If Available)
If you are using a compatible Mac running an older operating system, you can pull the installer directly from Apple's servers using a hidden App Store link. download macos high sierra 10136 dmg mac top
Terminal will download the full installer package directly from Apple’s servers and place it into your folder. Step 2: Convert the Installer App into a Standard DMG File
High Sierra automatically converts older solid-state drives (SSDs) from HFS+ to Apple File System (APFS). Ensure your data is fully backed up via Time Machine before starting the installation, as this structural shift alters how your drive manages partitions. To proceed with your deployment, please let me know:
MacBook (Late 2009+), MacBook Air (Late 2010+), MacBook Pro (Mid 2010+), Mac mini (Mid 2010+), or iMac (Late 2009+). Go to the Mac App Store on your eligible Mac
Open Terminal and use the following command to download the installer directly to your Applications folder:
Use the official macOS High Sierra App Store page .
If you cannot access a Mac to use the App Store, you can find community-uploaded images on the Internet Archive , which includes a High Sierra 10.13.dmg for download. Turn on the Mac while holding down the key
If the App Store method fails (common on newer Macs), the utility is a highly recommended third-party tool. It fetches official installers directly from Apple's servers and can package them as a DMG or ISO for you. 4. Creating a Bootable USB Installer
This content is intended for experienced users. Always back up your Mac before proceeding. For the best security and compatibility, Apple recommends using the latest version of macOS that is compatible with your Mac.
If your current Mac is running Catalina or later, you can download the full installer by entering this command in Terminal:
Includes AirPlay 2 multi-room audio support for iTunes. Top Ways to Download macOS High Sierra 10.13.6 DMG (2026)
Open and format the drive as Mac OS Extended (Journaled) with a GUID Partition Map . Name the drive Untitled .