Question: The adapter doesn't work with my Macbook Air 2014 for 4K display. It only puts out 1080p?
Answer: The Thunderbolt of MacBook Air 2014 is not "Thunderbolt 2" according to Apple support.
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5. Which Macs have Thunderbolt 2 ports?
The following models are Thunderbolt 2 capable:
MacBook Air (13-inch, Early 2015)
iMac (Retina 5K, 27-inch, Late 2014)
Mac mini (Late 2014)
MacBook Pro (Retina, 13-inch, Late 2013) and later
MacBook Pro (Retina, 15-inch, Late 2013) and later
Mac Pro (Late 2013)
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Thunderbolt 1st version is DP 1.1 compliant. The root cause could be on system port.
Feature Bullets
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Connect a Mini DisplayPort (Thunderbolt Port) equipped Apple Mac, Microsoft Surface Pro, Intel NUC, or Laptop/Desktop PC to an HDTV, projector, or display with HDMI input.
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Built with Parade PS8402A chipset. Preminum aluminum solid housing and high quality cable to ensure EMC performance at high data rate.
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Support resolutions up to 4K Ultra HD (or UHD) 3840x2160@30Hz (2160p) resolution, full HD 1080p HDTV, and stereoscopic 3D.
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Plug and play - no driver software installation required. CE, FCC certified. Built with high quality cable and over molded strain relief design to ensure superior flex life, tensile strength, and moisture protection.
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Compatible with Mini DisplayPort equipped laptops such as Apple MacBook, MacBook Air, MacBook Pro, Mac Mini, Mac Pro, iMac, Microsoft Surface Pro/Pro 2/Pro 3, DELL XPS, HP Envy, Lenovo ThinkPad, Google Chromebook Pixel, and most laptops/ultrabooks, etc.
Product Description
The Ableconn MDP2HD4KA is a high quality adapter which provides an easy and cost-effective solution for connecting an HDMI display such as monitor, projector, or HDTV to your Mini DisplayPort (Thunderbolt port) equipped Mac or PC. The product is built with preminum aluminum solid housing along with high quality cable to ensure EMC performance at high data rate.
Specifications
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Input: Mini DisplayPort (Thunderbolt) male
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Output: HDMI Type-A female
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Built with Parade PS8402A chipset.
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Type 2 Dual-Mode DisplayPort (DP++) cable adapter
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Connect up to 2 monitors via AMD Eyefinity Multi-Monitor graphics card (one adapter per monitor)
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DisplayPort 1.2 and HDMI 1.4 compliant up to 3.0Gbps (300MHz TMDS Clock)
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Support resolutions up to 4K UHD 3840 x 2160@30Hz and Stereoscopic 3D 1080p@120Hz
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Supported Resolutions: 800x600, 1024x768, 1280x768, 1280x800, 1280x960, 1280x1024, 1360x768, 1360x1024, 1366x768, 1440x900, 1600x900, 1600x1200, 1680x1050, 1776x1000, 1792x1344, 1800x1440, 1856x1392, 1920x1080, 1920x1200, 1920x2160, 2048x1152, 2048x1536, 2048x2160, 2560x1080@60Hz, 2560x1440@60Hz, 3840x2160@30Hz , 4096x2160@24Hz, 480i, 576i, 480p, 576p, 1080i, 1080p, 2160p@30Hz
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Certification: FCC, CE
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Bus-powered. Power Consumption: Maximum (4K Mode): 782mW; Standby Mode: < 400mW.
Note: Mini DisplayPort is only availabe on newer models of Mac. Macs made before 2010 are NOT able to provide audio signals through the Mini DisplayPort.
Compatibility
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Apple MacBook, MacBook Pro, MacBook Air, iMac, Mac Mini, Mac Pro; Microsoft Sureface Pro/Pro 2/Pro 3, DELL XPS, HP Envy, Lenovo ThinkPad, Google Chromebook Pixel, and most laptops with Mini DisplayPort interface.
Package Contents
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Ableconn Mini DisplayPort to HDMI UHD 4K Adapter
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User's Manual
Warranty
Limited One-Year Warranty and Lifetime Product Support