- Install the latest JRE from Oracle
- In the Java Control Panel, go to the Security tab and make sure 'Enable Java Content' is checked
- Open Safari
- Go to the ATO Business portal site https://bp.ato.gov.au/BpStatics/homepage.htm
- Click Login
- A dialog will apear asking you 'Do you want to trust the website “authentication.business.gov.au” to use the “Java” plug-in?'
- Click 'Trust'
- Now you will be asked 'Do you want to run this application?'
- Click 'Run'
- Another dialog will appear asking you to 'Allow access to the following application from this website?'