Cheapest external monitoring solution

I want to output from the HDMI on my rMBP so I can have a LG TV showing the output of the Viewer (for client viewing) what the cheapest solution I guess BMD?

I don't want to use the Mirror display option

Marc.

I used to have a dual display set up I used for exactly what you mentioned. I am now using a single 27" display, but if i recall correctly, if you have your monitor connected to your MBP in FCP there should be an Icon just above the inspector window on the upper right side of of window that looks like two squares, or something like it. If you engage that, you should get the viewer on the external monitor while all the other windows remain on MBP. If that makes any sense.

This should at least be a clue. Again, I used this feature all the time on my old MacPro two-display set up.

Hope this helps.

Thanks for the reply but thats not what I want. That icon (function) just gives you the same Mirroring options that you have in the computers preferences.

I want the FCPX layout to stay the same BUT want to output, through a connected HDMI) to a TV screen so clients can video the Viewer full screen.

I'm pretty sure that that button will do what you want. One thing I forgot to mention in my last post: There is a little pull down menu either from that button in the upper right to select what you want displayed on the second display. I believe there are three options and one is to show the viewer on the second (your lg display).

The button does allow me to view the Viewer on the TV screen BUT as mentioned I lose the viewer on the laptop.

I was to keep the configuration windows on the computer and then have the TV showing the output.

For what you want, a broadcast monitor, go to Preferences, Playback, bottom of that pane you'll see the A/V Output setting. If it shows up there, you can do what you want. If not, it won't use the HDMI output as a broadcast monitor. I've never used the HDMI on my rMBP so I'm not sure if that works or not.

Yes tried that and didn’t work.

Which takes me back to my original post I guess I need a Thunderbolt to HDMI box maybe from BMD or it could be that the HDMI is only 2 and not 3?

This could be the cheapest solution but you might need an adapter...
www.aja.com/products/t-tap

Read brochure carefully but it should do what you expect.
Other choice are I/O boxes which are more expensive .
EDIT:
Blackmagic design also offers this one:
UltraStudio Mini Monitor
Ultra small pocket sized Thunderbolt powered playback for SDI and HDMI.
$145
which is more useful if you use DaVinci resolve for grading
(usually only Blackmagic devices are supported to monitor in DaVinci Resolve )

I was able to have the workspace with the viewer on one display and another full screen version on another a few years back when I was working with FCP 7 and A Matrox MXO Mini BOB. Those were the badf 'ol days. The Matrox updates always ran a month or longer behind the OS/FC updates I would get it to function properly for a month or so before encountering all sorts of BS.

I digress. This won't help you with this issue but it was fun to vent a little...

Thats the kind of thing I was hoping for something by BMD I have used their products previously and get on with them better.

Anyone used this?

cvp.com/product/blackmagic_bmd-bdlkulsdzminimon

That is exactly the second suggestion that I mentioned , I do use BMD devices and I'm quite satisfied , the only problem that has been mentioned on the web and that I also had is to get the correct software to run it and it is not always the latest ! ? ...

Other than this situation these i/o and output devices are very good indeed.

It should be possible for you to watch your content on your TV via HDMI connection. Apple says that rMBP and Mac Pro late 2013 and younger can show FCPX 4k content via HDMI. (And that's correct because I use it every day).
Go to the preferences of FCPX.
Go to the third point in the menu "playback"
at the bottom got to: "a/v output".
Your LG TV should appear in that box if connected to your rMBP.
Also: in FCPX go to menu "windows" and select "a/v output".
This was not mentioned yet in the discussion and sometimes people forget this second step-
I cannot recommend BMD though. I had the "mini monitor" and it drove me crazy. I heard the comparable device from AJA is less error-prone.
But HDMI never gave me a problem and it should be possible for you too.

I welcome the reply but Schloerg my TV isn't recognised when I'm trying to output the Viewer. However I can output if I use the external display function which I don't want as mentioned on previous replies

You might want to try different resolutions on your monitor. For example my apple cinema display will not show up in that box in preferences when the resolution is set to 2560x1440. It will show up when the resolution is 1920x1080. (A/V output is supported by thunderbolt connection too)
The same with a Dell, connected via HDMI. No show when the Dell is set to 1920x1200 (which is the default size of the monitor) but it will show up in the box when set to 1920x1080. I don't know the resolution of your TV (is it 4k?) but you can try to set it to 1920x1080. SwitchResX is very helpful for that.

@shloerg: Thanks for this information. I did not know that. I'm considering buying a monitor for A/V output in FCPX since a while now (my favorite is the BenQ PD2700U) but was not sure how this could be set up so FCPX can output the viewer to that monitor. I have the 2017 iMac with Thunderbolt3 ports. So if I can find a Thunderbolt3 to HDMI2-cable (or USB-C to HDMI2) it should potentially work without any additional hardware?

Just to update got the BMD Ultra Studio Mini does exactly what I was looking for it to do.

@Michi
Sorry, that will not work. You need either a thunderbolt connection (T2 or T3) or a native HDMI output, like the mac pro or rMPB late 2013 and 2014. If you own by chance a OWC thunderbolt 2 dock or another thunderbolt device with HDMI output, then you are good to go. I use the OWC with HDMI output as well as an apple cinema Display 27' with a thunderbolt 3 to thunderbolt 2 adpater. I have the the same iMac as you do.
The cheaper connection with just an adapter is not working for HDMI. Maybe you go with the AJA device. AJA T-Tap. I do not like the BMD Ultra Studio Mini. I will produce errors all the time.

I see... Thanks for the clarification. I don't have an OWC dock but one from Satechi with an HDMI output (USB-C not Thunderbolt3). I will try out if I can connect my TV or any other HDMI-device to that dock and get FCPX to recognize it for A/V output...

Let me know if it works.