Enroll macOS Beta Seed without profile installation
$ sudo /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil
usage: seedutil enroll SEED_PROGRAM
seedutil unenroll
seedutil current
seedutil migrate OLD_VERSION NEW_VERSION
seedutil fixup
sudo /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil enroll DeveloperSeed
sudo /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil enroll PublicSeed
sudo /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil unenroll
sudo /System/Library/PrivateFrameworks/Seeding.framework/Versions/A/Resources/seedutil current
@fanaruto after the enroll you need to open System Prefs (or System Settings as of MacOS 13) and normally go to the update page and the Beta version of MacOS will show up and you need to click update