how to get full version of macOS 26 installer from InstallAssistant.pkg of macos 26

as said in the title, after I double clicked the InstallAssistant.pkg, I get an app file whose size is about 50 Mb. It must be not a full version, waiting some help, thanks

Posted on Sep 19, 2025 12:08 PM

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Posted on Sep 19, 2025 5:01 PM

sincos2007 wrote:

as said in the title, after I double clicked the InstallAssistant.pkg, I get an app file whose size is about 50 Mb. It must be not a full version, waiting some help, thanks


Where did you download it...? That is the stub only. macOS Tahoe is ~16.6 GB +/-


Terminal.app you can download. To see the full installer list C & P:

softwareupdate --list-full-installers



to download C & P:

sudo softwareupdate --fetch-full-installer --full-installer-version 26.0


(note: your psswd will not echo on screen type it in anyway, use the enter\return key to proceed.)



Once complete it will be sitting in yor Applications folder "Install macOS Tahoe.app"


2 replies
Question marked as Top-ranking reply

Sep 19, 2025 5:01 PM in response to sincos2007

sincos2007 wrote:

as said in the title, after I double clicked the InstallAssistant.pkg, I get an app file whose size is about 50 Mb. It must be not a full version, waiting some help, thanks


Where did you download it...? That is the stub only. macOS Tahoe is ~16.6 GB +/-


Terminal.app you can download. To see the full installer list C & P:

softwareupdate --list-full-installers



to download C & P:

sudo softwareupdate --fetch-full-installer --full-installer-version 26.0


(note: your psswd will not echo on screen type it in anyway, use the enter\return key to proceed.)



Once complete it will be sitting in yor Applications folder "Install macOS Tahoe.app"


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how to get full version of macOS 26 installer from InstallAssistant.pkg of macos 26

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