Once the download completes, the installer will launch automatically. Close the installer application. Open your Applications folder. Locate Install macOS High Sierra.app .
Installing macOS on older Mac models that Apple no longer officially supports.
High Sierra automatically converts SSDs to the APFS format. If you prefer to keep HFS+, you must use specific command-line flags during installation. If you would like to move forward, I can help you by:
Open your web browser and navigate to the official . download macos high sierra 1013 iso and dmg upd
Here are the two safest ways to get the OS.
This common error happens because Apple's security certificates for older installers have expired. To fix this, disconnect your internet, open Terminal during the installation setup, type date 0101010118 (which rolls back the system clock to 2018), and restart the installer.
date 122014102015 # sets date to Oct 14, 2015 (example) Once the download completes, the installer will launch
Apple continues to provide full legacy installers for macOS via the Mac App Store. However, because these versions are older, the links are usually hidden deep within their support ecosystem.
hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/HighSierra Use code with caution.
Downloading macOS High Sierra 10.13 can be tricky because it no longer appears in standard App Store searches. To get a clean Locate Install macOS High Sierra
Connect a USB flash drive to your Mac. Ensure it has a capacity of at least 16 GB (32 GB is recommended for safety). Open Disk Utility and erase the drive. Set the format to Mac OS Extended (Journaled) and the scheme to GUID Partition Map . Note the name you assign to the drive (for example, "MyVolume"), as you will need it for the terminal command.
This is a disk management tool that includes a "macOS Installer Creator" feature, which is useful for downloading older versions like High Sierra. Using this tool, you can avoid searching for hidden URLs. After installing the app, launch it and navigate to the macOS Installer Creator module. The tool automatically communicates with Apple's servers to retrieve the full installer, so the download is still originating from an official source. You can also use the tool to immediately burn the installer to a USB drive, streamlining the process if your goal is to perform a clean installation.
Some third-party websites offer direct download links for macOS High Sierra 10.13 ISO and DMG files. However, we do not recommend using these websites, as they may host malware or compromised files.