If you already have a working macOS High Sierra installation that you want to clone and deploy elsewhere, you can use R‑Drive Image to create your own .rdr file. This is an excellent way to create a backup or a template for multiple systems.
In the drop-down menu ("Restore from"), click and select your High Sierra image file. Click Restore to begin the bit-by-bit block copy process.
The system will open the Software Update panel and download the Install macOS High Sierra.app directly into your /Applications folder. Method 2: Using Terminal (macOS Catalina or Later) download macos high sierra 10.13.5 image file -.rdr-
If you manage a fleet of Macs on a local network, Apple Remote Desktop is the native choice for utilizing .rdr files. Launch on your administrator Mac.
Before you go down the .rdr route, you must be aware of the significant risks involved. Third-party disk images are a common vector for malware, and verifying their integrity is difficult. If you already have a working macOS High
Ensure you scan any downloaded image file with anti-malware software before running it. How to Download macOS High Sierra 10.13.5
: You can find various macOS High Sierra images, including ISO formats , which are useful for virtual machines. How to Use an .rdr Image File Click Restore to begin the bit-by-bit block copy process
Then restore the installer to that image, or use tools like createinstallmedia with a USB drive and image that.
You double-click. The installer launches—but it's not the familiar High Sierra wizard with the globe and the progress bar. It's the old NeXTSTEP installer. Black text on a grey gradient. No images. No branding.
You did not have write permission there. The system gave it to itself.
You type n .