To use a Pegasus R12 on a modern MAC, use the latest Pegasus R12 DEXT driver.

Managing a Pegasus R12 with a modern macOS

To manage a Pegasus R12 on a modern MAC, Use the latest PROMISE Utility Pro, v24.5.7

Installing the Pegasus R12 DEXT Driver for Thunderbolt Connection on macOS

To enable the Thunderbolt connection on a Mac, the Pegasus R12 DEXT Driver must be installed prior to connecting the device to the Thunderbolt port. This driver is compatible with macOS 12.4 or later.

Preliminary Check
1. Verify macOS Version: Click on the Apple symbol in the upper left corner of the desktop and select About This Mac to check if your system meets the macOS 12.4 or later requirement.

Installation Steps
1. Download the Pegasus R12 DEXT Driver
2. Run the Installer:
- Double-click the downloaded .pkg file.
- When the installer menu appears, click Continue.
3. Proceed with Standard Installation:
- Click Install and enter your password to authorize.
- If reinstalling, enter your password to allow modifications to the existing driver.
4. Enable System Extension:
- If prompted with System Extension Blocked, go to System Settings > Privacy & Security.
- Click Allow in Privacy & Security settings, then enter your password to unlock and confirm.
5. Complete Installation: After receiving a success message, click Close.
6. Verify Installation:
- Open Finder, go to Applications, and locate the DEXT Driver Installer to confirm installation.

Final Steps
1. Power Down the Pegasus R12: Press the power button on the device to initiate a shutdown.
2. Reconnect and Restart: Once powered down, restart the Pegasus R12 before connecting it to the host Mac.

Your Pegasus R12 is now ready to use with Thunderbolt on macOS.

Updating firmware in a Pegasus R12 (Online and Manual)

A. Update Firmware Online on Pegasus R12

1. In the Firmware Update menu, use the Online option to automatically check the installed firmware version. If the Pegasus firmware is not up-to-date, the user is prompted to Update. Click Update to start the firmware update process.

2. PROMISE Utility Pro will start to download the newest version. After the download is completed, next it will start to update the firmware.

3. The process will take several seconds to complete. Once the process has been completed, it is necessary to restart the computer. Click the OK button and restart the computer. Once the computer is powered on and booted up, you may continue to use the Pegasus R12.

B. Manual Firmware Update on Pegasus R12

Prior to utilizing the Pegasus R12 with your Mac computer, it's crucial to complete the update procedure. Please be aware that the Pegasus R12 firmware file isn't intended for Mac use; instead, it's utilized by the Promise Utility Pro to update the Pegasus R12 firmware.

Download and use the latest Pegasus R12  firmware

 To update the firmware using the latest PROMISE Utility Pro:

1. Open the PROMISE Utility Pro to the Firmware Update page. Click Update in the Firmware Update menu, then click Update in the pop-up menu to confirm your decision. 

2. Drag the firmware file into the PROMISE Utility Pro menu. PROMISE Utility Pro will start to upload the .img file from your computer. After the upload is completed, next it will start to update the firmware.

3.The process will take several seconds to complete. Once the process has been completed, it is necessary to restart the computer. It is the same for Online Firmware update.