macOS Tools
Download macOS Big Sur > Get it on the Apps Store
Download older versions of macOS
- macOS Catalina 10.15 (can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks)
- macOS Mojave 10.14 (can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion)
- macOS High Sierra 10.13 (can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion)
Create bootable macOS USB drive
- Download DiskMaker X
- Download macOS from App Store into Applications folder [Do NOT run installer]
- Attach a USB drive … Using Disk Utility erase USB drive [Name: Untitled] [Format: OS X Extended (Journaled)]
- Launch DiskMaker X … Follow the prompts to complete the USB creation …
https://support.apple.com/en-us/HT201372
Create bootable macOS Big Sur (10.16) install drive using <createinstallmedia> utility:
- Download macOS Big Sur from App Store into Applications folder [Do NOT run installer]
- Attach 8GB USB drive … Using Disk Utility erase USB drive [Name: Untitled] [Format: OS X Extended (Journaled)]
- Start Terminal and type:
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
Create bootable macOS Catalina (10.15) install drive using <createinstallmedia> utility:
- Download macOS Catalina from App Store into Applications folder [Do NOT run installer]
- Attach 8GB USB drive … Using Disk Utility erase USB drive [Name: Untitled] [Format: OS X Extended (Journaled)]
- Start Terminal and type:
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
Create bootable macOS Mojave (10.14) install drive using <createinstallmedia> utility:
- Download macOS Mojave from App Store into Applications folder [Do NOT run installer]
- Attach 8GB USB drive … Using Disk Utility erase USB drive [Name: Untitled] [Format: OS X Extended (Journaled)]
- Start Terminal and type:
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled
Create bootable macOS High Sierra (10.13) install drive using <createinstallmedia> utility:
- Download macOS High Sierra from App Store into Applications folder [Do NOT run installer]
- Attach 8GB USB drive … Using Disk Utility erase USB drive [Name: Untitled] [Format: OS X Extended (Journaled)]
- Start Terminal and type:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled