IMPORTANT NOTE: The M1 macOS does not include a Pegasus Driver, a Pegasus driver must be installed on all M1 Macs, preferably the DEXT (user space) driver.
The Pegasus line has been evolving for over a decade.
| Model | Year | Macos |
| Pegasus 1 | 2011 | Lion |
| 2012 | Mountain Lion | |
| 2013 | Mavericks | |
| Pegasus 2 | 2014 | Yosemite |
| 2015 | El Capitan | |
| Pegasus 3 | 2016 | Sierra |
| 2017 | High Sierra | |
| 2018 | Mojave | |
| 2019 | Catalina | |
| Pegasus 32 | 2020 | Big Sur |
| 2021 | Monterey | |
| Promise M4 (SSD) | 2022 | Ventura |
| 2023 | Sonoma | |
| 2024 | Sequoia |
During this time macOS has evolved from OS X Lion to macOS Ventura and soon Sonoma.
Windows 7 was primarily used in 2011 but many still used XP. Windows 11 is the current Windows version and support for Windows 10 will be ending in 2025.
Thinderbolt has evolved from Thunderbolt 1 to Thunderbolt 4.
Hard drives were from 1TB to 2TB in 2011, today drives of over 20TB are available with 30TB drives announced for the future.
In 2011 SSDs were a curiosity, slow with low capacity. Today SSDs are reliable, fast and have taken over as boot disks.
Much has changed over the decade. And using a device from 2011 like the Pegasus 1 is complicated by all these changes.
Here are some basic rules.
- For any legacy Pegasus device, please update to the last firmware released for that Pegasus. Firmware from other generations of Pegasus cannot not be used.
- Drivers and the Promise Utility from the shipping Promise Pegasus should be used, today that means the Pegasus32. Drivers written for macOS High Sierra won't work in M1 Ventura. Promise drivers are backwards compatible. The Pegasus32 Promise Utility is backwards compatible. The Promise Utility Pro has limited backwards compatibility.
- Drivers and the Promise Utility are backwards compatible, but they are not forward compatible. When an older macOS like Mojave is used, the latest Pegasus32 driver and Promise Utility probably will not work due to changes in macOS. The suggestion is to use the drivers and Promise Utility that were released in the same timeframe as the macOS. The article beginning shows the timeframes of macOS and the Pegasus line.
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For a Pegasus 1 with a modern macOS.
Use the latest Pegasus 1 firmware v5.04.000061
There is a KB on updating firmware on the Pegasus 1 and Pegasus 2
Use the latest Pegasus32 driver. For Intel macOS, the driver is builtin. For M1 macOS use the DEXT driver v21.1.0-2
Do not use the latest Promise Utility, use a slightly older version v4.06.0000.01
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For a Pegasus 2 with a modern macOS.
Use the latest Pegasus 2 firmware v5.04.0000.64
There is a KB on updating firmware on the Pegasus 1 and Pegasus 2
Use the latest Pegasus32 driver. For Intel macOS, the driver is builtin. For M1 macOS use the DEXT driver v21.1.0-2
Do not use the latest Promise Utility, use a slightly older version v4.06.0000.01
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For a Pegasus 3 with a modern macOS.
Use the latest Pegasus 3 firmware v6.06.0000.45
Use the latest Pegasus32 driver. For Intel macOS, the driver is builtin. For M1 macOS use the DEXT driver v21.1.0-2
Use the latest Promise Utility, v4.06.0000.04
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For the Pegasus 32 and Pegasus M4 with a modern macOS.
Use the latest Pegasus 32 firmware v6.06.0000.45
Use the latest Pegasus32 driver. For Intel macOS, the driver is builtin. For M1 macOS use the DEXT driver v21.1.0-2
Use the latest Promise Utility, v4.06.0000.04
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Note: M1 is an architecture (actually ARM architechure), M2 and M3 are the next generations of Apple Silicon, but they use the same M1 architechure, an M1 driver will work with an M2 or M3.
