Move the most important aspects of your software to hardware. Hard for MacOS but for a Chromebook style thing you could write the browser into its own pice of wafer.
Google should pay me to be this evil.
So now you have a piece of silicon with a two year old version of Chrome with seventeen CVEs hard-coded into it, and still have all the same antitrust problems because the device still also has an ordinary general purpose CPU that you're still anti-competitively impeding people from using to run Firefox or Ladybird.