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I need to run a 50ft cable from a 2013 mac pro, to my tv. What do you think would be better, plugging into the hdmi port on the Mac Pro, or using a thunderbolt to hdmi adapter, then plugging the hdmi cable into that.
Mac Pro, OS X Yosemite (10.10.5)
For ThunderBolt to exceed the limit of 3 meters, it would be necessary to go with fiber cables which have a limit of 60 meters
For Hdmi the limit is 30 meters of cable length. To go beyond that you would need to do HDMI over Fiber which would give a cable length of 100 meters.
Unless your TV is ThunderBolt capable, you are wasting your time looking at ThunderBolt cabling. The subset of Thunderbolt signals that runs displays is Mini DsiplayPort, and neither it or HDMI is likely to work at those distances.
I think you may need either an HDMI Extender or an Apple-TV box and a connection from your Router.
HDMI cable length:
A cable of about 5 meters (16 feet) can be manufactured to Category 1 specifications easily and inexpensively by using 28 AWG (0.081 mm²) conductors.[107] With better quality construction and materials, including 24 AWG (0.205 mm²) conductors, an HDMI cable can reach lengths of up to 15 meters (49 feet).
So even with very good cables, you are at the outer limit of what is possible without an Extender:
Extenders[edit]
An HDMI extender is a single device (or pair of devices) powered with an external power source or with the 5V DC from the HDMI source.[116][117][118] Long cables can cause instability of HDCP and blinking on the screen, due to the weakened DDC signal that HDCP requires. HDCP DDC signals must be multiplexed with TMDS video signals to be compliant with HDCP requirements for HDMI extenders based on a single Category 5/Category 6 cable.[119][120] Several companies offer amplifiers, equalizers and repeaters that can string several standard HDMI cables together. Active HDMI cables use electronics within the cable to boost the signal and allow for HDMI cables of up to 30 meters (98 feet).,[116] those based on HDBaseT can extend to 100 meters, HDMI extenders that are based on dual Category 5/Category 6 cable can extend HDMI to 250 meters (820 feet), while HDMI extenders based on optical fiber can extend HDMI to 300 meters (980 feet).[117][118]
source:
https://en.wikipedia.org/wiki/HDMI
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Isn't that getting expensive? What about an ethernet cable connected to an apple tv. all im using it for is to play movies.
Thunderbolt vs HDMI
