For InstallAssistant.pkg (common name for full installer DMG):
First, allocate space for a temporary disk image that will hold the installer contents. Open Terminal and run:
Mount the newly created image onto your system so it acts like a plugged-in drive:
Insert a USB flash drive (minimum capacity) into your Mac. macos big sur 1121 installer dmg
Note: You will be prompted to type your Mac's login password. The cursor will not move while typing; this is a standard security protocol. Press Enter after typing. 4. Unmount the Completed Volume
Your completed DMG file is currently resting in the temporary /tmp/ directory. Move it to your Desktop for permanent storage or external transferring: mv /tmp/BigSur1121.dmg ~/Desktop/ Use code with caution.
Before deploying your newly created installer image, verify that the target machine officially supports macOS Big Sur: : 2015 and later MacBook Air : 2013 and later MacBook Pro : Late 2013 and later Mac mini : 2014 and later iMac : 2014 and later iMac Pro : 2017 and later Mac Pro : 2013 and later For InstallAssistant
Apple released macOS Big Sur 11.2.1 to address critical system vulnerabilities and resolve a frustrating hardware bug affecting MacBook Pro charging capabilities. For system administrators, power users, and those performing clean installations, having a standalone DMG installer file is essential.
to convert a Big Sur installer app into a bootable DMG file?
Complete Guide to the macOS Big Sur 11.2.1 Installer DMG The update, released in February 2021, is a critical maintenance release for users maintaining older hardware or troubleshooting specific system bugs. While Apple primarily distributes updates through the App Store, many power users and system administrators require a standalone DMG installer for clean installs, creating bootable USB drives, or managing multiple Macs without repeated large downloads. Why You Need macOS Big Sur 11.2.1 The cursor will not move while typing; this
Because Apple delivers modern installers as .app bundles instead of disk images, you must manually package the application into a .dmg format if your workflows require it. This is achieved by creating a blank disk image, mounting it, and copying the installer assets over. Step-by-Step Terminal Commands
hdiutil create -o /tmp/BigSur -size 14000m -volname BigSur -layout SPUD -fs HFS+J Use code with caution. 2. Mount the Blank Image
Key features and updates included in this version's installer/update are: MacBook Pro Battery Fix