Your Late 2014 Mac mini is capable of providing video out either the Thunderbolt 2 or HDMI ports and can support up to two displays at 2560 x 1600 pixels. Both ports have a number of display options as per the Apple specifications for this desktop device.
Best Monitors For Mac Mini 2014
Ref: Mac mini (Late 2014) - Technical Specifications - Apple Support
Video Support
- Support for up to two displays at 2560 by 1600 pixels, both at millions of colors
- Thunderbolt digital video output
- Native Mini DisplayPort output
- DVI output using Mini DisplayPort to DVI Adapter (sold separately)
- VGA output using Mini DisplayPort to VGA Adapter (sold separately)
- Dual-link DVI output using Mini DisplayPort to Dual-Link DVI Adapter (sold separately)
- HDMI video output
- Support for 1080p resolution at up to 60Hz
- Support for 3840-by-2160 resolution at 30Hz
- Support for 4096-by-2160 resolution at 24Hz
- DVI output using HDMI to DVI Adapter (sold separately)
Based on these specs and the various port configurations, you can narrow down your search for a monitor that can provide your mini with the best possible resolution combination.
The Mac mini takes monitors with various different connectors and resolutions. You can get adaptors to make the machine take more types of connector but out of the box, it's ready for Thunderbolt.
Monitor For Mac Mini 2013
- The following 3-monitor setup worked for me:. Late 2014 Mac Mini with 8GB RAM (purchased Oct 2015). 3 monitors, each with 1920x1200 resolution. Monitor 1: driven by Mac mini HDMI port (HDMI-to-HDMI cable). Monitor 2: driven by Mac Mini thunder.
- Best Monitor For Mac: ASUS TUF VG27AQ. ASUS TUF VG27AQ.
- Apple's specs show that the late-2014 (which is still being sold today, October 2015) Mac Mini can support up to two displays using its HDMI and thunderbolt ports. I've confirmed this by trying to plug in 3 monitors directly into the ports on the Mac Mini (two via thunderbolt, 1 via HDMI), with the same results as the OP.one of the monitors is not driven.