It states minimum horizontal and vertical refresh rates of 88 kHz and 48 Hz.
#MAC PRO MID 2012 PORTS MANUAL#
The manual does show different supported resolutions down to 1920 x 1080 and different refresh rates down to 30 Hz. 4096 x 2304 30Hz might work, but I don't know the limits of the Intel HD Graphics 4000 or Apples driver. Little Big Replacement for MacBook Pro Charger 60W L-tip Magnetic Connector, Additional Charging Ports Replacement MacBook Pro Charger l tip, Compatible with MacBook Pro Retina 2010 - mid 2012. The MacBook Pro Mid-2012 only has Thunderbolt 1 (10 Gbps) with DisplayPort 1.1 (8.64 Gbps) so you'll definitely need to use a much greater reduced refresh rate or resolution such as 3840 x 2160 30 Hz or 2560 x 1440 60 Hz. The display is 4096 x 2304 60Hz, which is greater than the usual 3840 x 2160, so you might have to reduce the refresh rate or resolution. The MacBook Air has Thunderbolt 2 (20 Gbps) with DisplayPort 1.2 (17.28 Gbps) which should support a 4K resolution.
A Thunderbolt 3 port can work as a Thunderbolt port (up to 40 Gbps) or a USB-C port (with USB speeds up to USB 3.1 gen 2 which is 10 Gbps) with DisplayPort 1.2 alt mode. You'll need a Thunderbolt 3 device that has two Thunderbolt 3 ports (such as a Dock or RAID or PCIe Expansion box) or one Thunderbolt 3 port and one USB-C with DisplayPort alt mode port. However, I don't know of any Thunderbolt 2 devices that have such a port, so you'll need a Thunderbolt 3 device and connect it with the Apple Thunderbolt 3 to Thunderbolt 2 adapter. It replaced the iBook series of notebooks as a part of Apples transition from PowerPC to Intel processors. A new line of computers by the same name was released in 2015, serving the same purpose as an entry-level laptop. With a Thunderbolt device, you can give your computer a USB-C port with DisplayPort alt mode. The MacBook is a line of Macintosh notebook computers designed, manufactured and sold by Apple Inc. The Apple Thunderbolt 3 to Thunderbolt 2 Adapter cannot output a USB-C with DisplayPort alt mode signal - it is only for connecting Thunderbolt devices. The MacBook Air and MacBook Pro Mid-2012 do not have USB-C ports. You are referring to the LG UltraFine 4K display which is a USB-C display using a single USB-C cable for USB-C DisplayPort alt mode (video) and USB 2.0 (data - for audio, USB ports, etc).
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