I've identified a key phrase in your input: 'NVDA 2023.3 RC 2 instal the new for mac'. Based on the provided text, I can summarize the following information:

* NVDA 2023.3 Release Candidate (RC) 2 is now available for download and testing.

* It's encouraged that all users download this RC and provide feedback to help identify any critical bugs.

* If no critical bugs are found, this release will be identical to the final 2023.3 version.

To assist with installing NVDA 2023.3 RC 2 on Mac, I can offer some general steps:

1. Go to the official NVDA website () and click on the 'Download' button.

2. Select the 'Mac' option from the dropdown menu.

3. Choose the correct package format (e.g., DMG or ZIP) for your Mac.

4. Download and save the installation file to a location on your computer.

5. Open the downloaded file and follow the installation instructions.

Please note that you may need administrator privileges to install NVDA 2023.3 RC 2 on your Mac. Additionally, it's recommended to create a backup of your system before installing any new software.

If you have any specific questions or encounter issues during the installation process, feel free to ask!