Install macOS Tahoe Beta 4 from the Terminal (Erase All Disk) New Fresh Install

[Max.1974]

To install macOS Beta 4 using a Terminal command, just run this command, which will perform a fresh installation. However, it includes a command to erase your current installation, and it will install the new system on the same drive. Upon reboot, it will delete the previous installation and overwrite the old system with a new one. 

 

1. Download the installer .pkg file and install it in the Applications folder.

 

https://swcdn.apple.com/content/downloads/05/26/082-89906-A_7DP8EBEVZJ/g3p7sya93v36h1ri0h940xxuxutt23igcw/InstallAssistant.pkg 

 

or

https://github.com/perez987/DownloadFullInstaller/releases

 

2. On the same system where Beta 3 or an earlier version is running, run the command below:

 

echo "Drag the target volume here and press Enter:"; read target_volume; if [ "$(basename "$target_volume")" != "macOS Tahoe" ]; then diskutil rename "$target_volume" "macOS Tahoe"; fi; target_volume="/Volumes/macOS Tahoe"; sudo /Applications/Install\ macOS\ Tahoe\ Beta.app/Contents/Resources/startosinstall --eraseinstall --newvolumename "macOS Tahoe" --agreetolicense --nointeraction --passprompt --rebootdelay 60

 

3. Let it complete 100% in the Terminal. After about 60 seconds, the system will reboot 2 or 3 times. The new system will fully overwrite the previous one, and a fresh installation will be completed, bringing up the login screen.

 

It will delete the entire system, so make sure to back up your data. However, it will not delete your EFI, and you do not need to disable SIP in Recovery mode.

 

Lenovo ThinkPad T14 macOS 26 Tahoe Beta 4

 

Vídeos tutorials:

 

In this videos, we show how to install macOS Tahoe Beta 4 using a simple Terminal command.

 

1.  Portuguese 

https://youtu.be/_VEiUzAgt98

 

2. English 

https://youtu.be/4nHaJ-qh0TM

 

 

 Enjoy It   

 

Hackintosh forever! 

 

Spoiler

 

Edited July 23, 2025 by Max.1974