Cable Matters 4K Mini DisplayPort to Mini DisplayPort Cable in Black 6 Feet - Not a Replacement for Thunderbolt Cable, Not Compatible with iMac, Not Support Target Display Mode

This is another excellent cable from Cable Matters. Well-built, braided outside. Works well at 4K

Ok. I have a late 2009 27" iMac and a late 2012 21.5" iMac, both of which support Target Display Mode from another source. In this case, from the 2012 (which now runs Mojave) to the 27" (which doesn't, so stays on High Sierra). Since they sit next to each other, all I needed was a 3' cord. White is a good color for the rest of my setup (wood, silver/metal and white accents).As soon as it arrived the first thing I noticed was the really nice, professional packaging it came in. The cable itself feels like a quality construction and came with end caps. I plugged one end into the Thunderbolt port (which supports Mini DisplayPort cable) on the source Mac (21.5") and the other end into a Mini DisplayPort jack on the target Mac (27"). Bingo. The screen from the source immediately appeared on the target. Works as it should!Bonus: sound comes from the source Mac, too. Really happy with this product!

working like it should. I hope it continues to work well. I own a mid 2012 MBP Retina i7, and a mid 2010 iMac 27" i5. I use this cable to be able to use the iMac as an external monitor.Works like a charm. I just plug it in, wait a sec, and it connects perfectly. I need to look into display settings. I am used to having the ability to have the screens side by side as individual screens and when I swipe between screens both would scroll at the same time, essentially giving me 8 desktops of workspace (with 4 tabs on MBP). Really made things faster swiping between desktop screens than clicking on tabs on top of the screen.I had considered getting the clamshell for the MBP, and may still, but until I decide whether or not to upgrade my monitors and or computer (iMac to 5k), I am holding off. Darn budgets. Am a photographer that uses these mainly for editing. Great products (apple) and this cable enables me to improve my workflow. Would recommend.

Below you'll find my original review which I gave two stars on. Cable Matters reached out and gave me a replacement cable which did in fact show that my original cable was simply defective. After trying the replacement cable out for a week, I haven't experienced the same issues I had been seeing. When comparing the cables, it is obvious that my original cable had a defective terminal on one side, it was strangely loose, which I believe likely means a wire may be frayed due to repeated flexing, and that led to my monitor being disconnected randomly. I think it is likely since the terminal connectors are slightly longer than most connectors, by 0.5-1mm, which allows pressure to be put onto the terminal and cause this issue. I've reinforced my new cable slightly with a small amount of glue to hold the terminal to the black housing which helps put more of the pressure on the entire cable instead of the terminal itself. I'm not sure how this will work out long term, but it'll likely work for for awhile.My original review:Usually Cable Matters is good quality, however this cable is not. It's terminals are poorly designed, creating a very loose connection which results in my monitor being disconnected frequently. And while it does support 4k resolutions, the lose connection causes a lot of odd results. I've had to disable DP 1.2 to prevent things from acting up too much, but I'm just going to replace this low end cable with something a bit better quality so I can use 4k without issues.

I had to connect a 2015 MacBook Pro to 4K Dell monitor. HDMI connection was very slow to come up, but both had miniDP connectors and with that cable startup is much faster

Good product

If you have a microsoft surface dock and have a Dell monitor with a mini-DP input, get this cable.I tried to use the mini-DP to DP cable that came with my Dell monitor and it would not work with the dock, even though the cable worked fine when I plugged it directly into my surface pro (5). Literally.... plug the mini-DP to DP cable into the surface Pro = Works. Unplug it and plug it into the surface dock = didn't work.I almost gave up and returned my surface dock until I saw this cable. Plugged it into the dock and it worked instantly. I am getting a second in case the first cable breaks. Without this cable my dock is a boat anchor.

Unfortunately, like the vast majority of DisplayPort cables on the market, these are not DisplayPort certified by VESA. I purchased these cables in the spring of 2015 to attach a Dell P2715Q 4K display to a iMac 5K Retina as a secondary display. Originally, the cable worked well with no issues. After about a year, I began to have issues with Dell intermittently going black for about split second before restoring. I had read about issues with Dell displays an assumed it was the monitor that was at fault.As time went on the intermittent screen blackout grew more frequent and based on further research I found that the cable may have been the problem. My search for a resolution led me to the official DisplayPort Webpage on selecting cables. It turns out that VESA certifies cables for compatibility with the DisplayPort spec and only DisplayPort-certified cables may carry the DP symbol. These cables do not have the DP symbol and are not on the short list of DisplayPort-certified cables; there are only 23. On top of that only two of the certified cables can be used with Macs as most of the certified cables do not have at least one mini-DisplayPort connector.Both of the Mac-compatible cables are from Accell and I recently purchased the Accell UltraAV Mini DisplayPort to DisplayPort Cable to replace the CableMatters cable. The new cable seems to removed the screen blackout issue. I find it sad that the vast majority of DisplayPort cables available are not built to the standard required to properly handle UltraHD/4K computer displays.