LeoNatan

sudo /usr/libexec/PlistBuddy -c "Add 'GelatoCore:Enabled' bool false" /Library/Preferences/FeatureFlags/Domain/Messages.plist
sudo /usr/libexec/PlistBuddy -c "Add 'Gelato:Enabled' bool false" /Library/Preferences/FeatureFlags/Domain/Sharing.plist

To restore defaults:

sudo /usr/libexec/PlistBuddy -c "delete 'GelatoCore:Enabled'" /Library/Preferences/FeatureFlags/Domain/Messages.plist
sudo /usr/libexec/PlistBuddy -c "delete 'Gelato:Enabled'" /Library/Preferences/FeatureFlags/Domain/Sharing.plist

Reboot your machine after these changes.

LeoNatan

csrutil disable
sudo nvram boot-args="intcoproc_unrestricted=1 kext-dev-mode=1 amfi_allow_any_signature=1 amfi_unrestrict_task_for_pid=1 PE_i_can_has_debugger=1 cs_enforcement_disable=1 amfi_get_out_of_my_way=1 amfi=0xff cs_debug=1 ipc_control_port_options=0"
sudo spctl --global-disable
sudo defaults write /Library/Preferences/com.apple.security GKAutoRearm -bool NO
sudo defaults write /Library/Preferences/com.apple.security.coderequirements Entitlements -string always
sudo defaults write /Library/Preferences/com.apple.security.coderequirements AllowUnsafeDynamicLinking -bool YES
sudo defaults write /Library/Preferences/com.apple.security.libraryvalidation.plist DisableLibraryValidation -bool YES
defaults write com.apple.loginwindow DisableScreenLockImmediate -bool yes