The Complete Guide to Downloading and Installing the macOS High Sierra 10.13.6 DMG
To install macOS High Sierra 10.13.6, your Mac must meet the following system requirements:
High Sierra introduces the Apple File System (APFS) for solid-state drives (SSDs). If your Mac has an SSD, the installer will automatically convert the drive from HFS+ to APFS. Step 1: How to Download the Official macOS High Sierra DMG
The process will take 10–20 minutes. You'll see progress indicators as the drive is erased and the installer files are copied. When you see "Done," the bootable USB is ready for use.
Back up any existing data on the USB drive, as this process completely erases the device. Formatting the USB Drive Plug your USB drive into your Mac. Open (Finder > Applications > Utilities). macos high sierra 10136 dmg install
A clean installation removes all accumulated system junk, old caches, and potential malware footprints. Turn off the target Mac completely.
Disconnect your Mac from the internet. Open Terminal within the installer utilities menu and change your system clock to a date closer to the OS release window (e.g., 2018) using this command: date 0101100018 Use code with caution. (This sets the date to January 1, 2018).
Once you have the installer (usually found in your /Applications folder as "Install macOS High Sierra"), you need to move it to a USB drive (at least 16GB). Method: Using the Terminal (Recommended) Connect your USB drive and rename it to MyVolume .
An operating system installation carries inherent risks of data loss. Always perform a complete backup using or manually copy your essential documents, photos, and files to an external hard drive before continuing. Booting from the USB Installer Shut down the target Mac completely. Insert the bootable USB flash drive into an open port. The Complete Guide to Downloading and Installing the
Select your current startup drive as the installation target.
Click . Once finished, close Disk Utility to return to the main menu. Deploying the Operating System
A DMG file is a compressed or uncompressed disk image that mounts as a virtual volume in macOS. Unlike the standard Install macOS High Sierra.app (which Apple distributed via the App Store), a standalone DMG may contain:
The USB drive must be formatted as Mac OS Extended (Journaled) with a GUID Partition Table. You'll see progress indicators as the drive is
Keep holding the key until the Startup Manager screen appears showing your available boot drives.
Select your internal hard drive (usually named Macintosh HD ) from the left sidebar. Click at the top. Configure the settings: Name: Macintosh HD
Insert your bootable High Sierra USB installer into a USB port.
The system will download the complete installation package directly from Apple's servers into your Applications directory.
You will need a USB flash drive with at least of capacity. On a Mac (Recommended)