The labels on the buttons to select your old Mac or new Mac could be improved to help with describing the buttons to users leveraging VoiceOver. They currently say 'Old_mac' and 'New_mac'. Better names for these buttons (these are not visible to the sighted user) would be the ones in text below the buttons 'This is my new Mac' and 'This is my old Mac' to help the impaired user know the correct option.