Most of the time, you can re-download the current version of macOS via the Mac App Store, and older ones via these links:
However, I’ve run into a situation several times where the Software Update mechanism simply refuses to initiate a download:
Download macOS Catalina and install on PC-Hackintosh and in macOS Catalina 10.15. There are some changes that you should know about it. Most of the great thing that you may like in Mac with great experience, Music, TV, The three nice changes in Mac all new Apps, iPad Apps for Mac, Sidecar turns your iPad into the second screen, Voice control, New music App, The Apple TV App, The Apple. The macOS Catalina installer software is over 8GB, so you need a USB external drive that can hold that much data. The drive can be a thumb drive, hard drive, or SSD. Download Install Disk. MacOS Catalina runs in its own read-only volume, so it’s separate from all other data on your Mac, and nothing can accidentally overwrite your system files. And Gatekeeper ensures that new apps you install have been checked for known security issues before you run them, so you’re always using good software.
Thankfully, macOS installers can be downloaded via Terminal in macOS Catalina. This command will download the most recent version of macOS, depositing it in your Applications folder:
softwareupdate --fetch-full-installer
Music, TV, and podcasts take center stage. ITunes forever changed the way people experienced. In addition, with macOS Catalina arriving on Macs, we look into what to do if you can't download macOS Catalina, fixes for when macOS Catalina won't install, and what you need to do if your Mac.
The
softwareupdate
command has some neat tricks up its sleeve, as pointed out by Armin Briegel: The
--fetch-full-installer
flag has a sub-flag: --full-installer-version
which allows you to download a specific version. During my testing in the Catalina beta version I was able to download 10.15, 10.14.6, 10.14.5, and 10.13.6. I was not able to test if 10.13.6 would download the hardware specific build of 10.13.6 for the 2018 MacBook Pro, since I do not have that hardware.
So, to pull 10.13.6 down, you’d use:
softwareupdate --fetch-full-installer --full-installer-version 10.13.6
I wish Apple would just have a support document up with direct downloads for all of this stuff, but this tool is not a bad alternative.
Download Macos Catalina Installer App
Update: Don’t miss this documentation from JAMF for more on the subject.