Regarding #5, ChromeOS is open source unlike OSX which is running on your macbook air. Both companies are motivated to collect information about you. The differ

Regarding #5, ChromeOS is open source unlike OSX which is running on your macbook air. Both companies are motivated to collect information about you. The difference is that with ChromeOS you or someone else can identify when and how information is collected by reviewing the sourced code. With OSX, only Apple knows when and how. What they do with this information is a different answer.