Connecting a Macbook Pro to a CRT Sony Trinitron

I don't think that TV comes close to the lowest resolution possible by the laptop. The TV would be out of the range needed to display - additionally you have multiple converters and that introduces a number of failure points.

the Mac could be too high and the TV too low, they could cross somewhere in between but the frequency or refresh is out of sync, it might just be they are or that one of the converter attachments might throw it off. From what I can tell that the TV was simply not designed to work with a computer, just video players and cameras which work very differently.

The minimum resolution you are likely to get out of your Mac is 1024 x 640. The Trinitron does not work in pixels and requires 625 (UK) or 525 (USA) lines. The only way you are going to get this to work is to get a standards converter which the Mac can talk to, and which will output a raster of the required number of lines: and I very much doubt that any such animal exists - the only requirement in most cases is the other way round, to convert SD analogue to something a Mac an accept.

Even if such a converter exists it would very likely cost more than a basic computer monitor.

you appear to have several different inputs on that TV.

I recommend you ignore Composite video and SCART chips entirely. It is a cute trick to get everything mashed together correctly for "Composite Video" (which is Red, Green, Blue, and Syncs all mashed together), but the display will immediately take them apart again anyway. The quality of the mashed-together signal will not be very good.

You appear to have the inputs required for an RGB input, which is indistinguishable from VGA input when properly wired.

Those wonky connectors on the back are:

21 pin euro connector, (CENELEC standard) including audio/video input, RGB input, TV audio/video output.

Your Mac can make an RGB output by using a ThunderBolt to VGA adapter. Then you need to make or buy a cable that re-wires the VGA: {Red, Green Blue, H-Sync and V-sync} signals onto the 21-pin CENELEC connector.

Mini DisplayPort is a subset of all the signal provided at the computer-end for thunderBolt-2 (ThunderBolt-3 gets simpler in some ways and more complex in others).

NB>> I see that several Readers have expressed doubt that you can get the Mac resolutions low enough to work on that TV set. I have no information that contradicts what they are saying.

what model MacBook pro? including year, early mid late and screen size and processor speed?

what ports do you have on your MacBook pro?

https://en.wikipedia.org/wiki/SCART

.