2012 Mac Pro 5,1 Monterey 12.6, 128GB, 1TB NvMe, Pow Mod, 6600 EFI flashed

Apple Mac Pro 2012 (Model 5,1) in excellent upgraded condition.
This is the fully updated 2012 firmware version (Boot ROM 144.0.0.0.0) and supports macOS Monterey through OpenCore, with future macOS upgrades possible.
This system is extremely fast, quiet, and reliable — ideal for music production, photography, 4K video work, development, or running multiple VMs.
System Specifications
• Model: Mac Pro (Mid 2012) – 5,1
• Boot ROM: 144.0.0.0.0 (latest firmware)
• Processor: 12-Core 3.46GHz Intel Xeon (X5690 pair)
• Memory: 128GB RAM
• Graphics: AMD Radeon RX 6600 8GB (EFI flashed for bootscreen)
• Storage: 500GB SSD
• macOS: Monterey installed via OpenCore (fully functional and tested)
Performance Notes
• 12-core 3.46GHz CPUs are the fastest configuration available for Mac Pro 5,1
• RX 6600 GPU provides modern performance, smooth UI, and multi-display support
• Monterey installation allows current software and security updates
• Bootscreen works thanks to the EFI-flashed GPU
• Boot ROM 144 enables APFS, NVMe support, OpenCore, and future macOS upgrade options
Connectivity
• 4 x USB 2.0
• PCIe slots for upgrades
• Dual Ethernet ports
• Multiple Display Outputs from RX 6600
• Audio in/out
• Optical drive bay
Included
• Mac Pro 2012 tower
• Installed RX 6600 8GB EFI GPU
• 1TB NvMe
• Power cable
• Power Mod Cable ( installed 8 PIN )
• Clean installation of macOS Monterey
• System fully tested and ready to use
• McFiver w/ 2 USB C ports, 1 Ethernet 10,100,1000

Shipping
Packed with padding and double-wall box.
Weight approximately 54 lbs with packaging.
Free UPS Ground shipping within the United States.
Security
Serial number and internal hardware configuration are recorded for fraud protection.
Serial can be shared with the buyer through eBay messages after purchase.