Macos High — Sierra 10136iso
Searching for “macos high sierra 10136iso” reveals a common misunderstanding. Apple never released an ISO. The safest, fastest, and most reliable path to running High Sierra 10.13.6 is:
If you simply need an old macOS version for legacy software or hardware, High Sierra 10.13.6 remains a robust, stable choice. Just stay away from sketchy “ISO” download sites. Your digital hygiene – and your Mac – will thank you.
Since the installer comes as an App, you need to convert it into a disk image (DMG) and then into an ISO. We will use the Terminal for this process.
A. Create a temporary DMG file: This creates a blank disk image.
hdiutil create -o /tmp/HighSierra.cdr -size 5200m -layout SPUD -fs HFS+J
B. Mount the DMG: This mounts the blank image so we can write data to it. macos high sierra 10136iso
hdiutil attach /tmp/HighSierra.cdr.dmg -noverify -mountpoint /Volumes/install_build
C. Create the Install Media: This copies the High Sierra installation files into the mounted DMG. This command takes several minutes to complete.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build
(Type Y to confirm when asked).
D. Unmount the DMG: Once the creation is finished, unmount the volume.
hdiutil detach /Volumes/Install\ macOS\ High\ Sierra
Note: If you get an error saying "Resource busy," just wait a moment and run the command again. You may need to rename the volume in the command to /Volumes/install_build if the label didn't change. Searching for “macos high sierra 10136iso” reveals a
E. Convert the DMG to ISO/CDR: This converts the DMG file into a CD-R format (which acts as an ISO).
hdiutil convert /tmp/HighSierra.cdr.dmg -format UDTO -o ~/Desktop/HighSierra.iso
F. Rename to ISO:
This moves the file to your desktop and renames the extension from .cdr to .iso.
mv ~/Desktop/HighSierra.iso.cdr ~/Desktop/HighSierra.iso
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ High\ Sierra.app --nointeraction
This creates a bootable installer that works natively on any supported Mac (2009-2017 era). You boot by holding Option (⌥) at startup.
No ISO needed – the USB will contain a HFS+ or APFS partition with Apple’s proprietary bootloader. If you simply need an old macOS version
Instead of hunting for an ISO, create a bootable USB drive from the official .app:
macOS installers are distributed as:
Apple never provided an official ISO for High Sierra. Third-party websites that claim to offer “macOS High Sierra 10.13.6 ISO” have:
Verdict: A truly clean “macOS High Sierra 10.13.6 ISO” does not exist from Apple. Proceed with extreme caution if downloading from unofficial sources.
Apple still provides older macOS versions, but they are hidden in the App Store. To download High Sierra 10.13.6:
Note: If you’re running a newer macOS (Mojave+), the App Store may deny the download. Use a non-APFS formatted USB or another older Mac.