Can I use older Apple monitor with MacBook Pro?

Hi,

USB-C to Thunderbolt 2 adapter should works.

https://www.apple.com/shop/product/MMEL2AM/A/thunderbolt-3-usb-c-to-thunderbolt-2-adapter?fnode=8280f6cce44837622ac85154099803eea0f3d60f452c75982bca238e4e955de301f93f2b99b70ffde138b2548754e7a2fc5bafcf48d8e0a399155740580c4620bb6a419bdf781ac15af5bdb4b448d9599c93865ae0fa678013c74adc54aacdfc2a11af0417feae4c2168ed2e0a756d3c&fs=f%3Dadapter%26fh%3D4595%252B45b0

Also USB-C to USB-A adapter could work for built-in camera and speakers.

https://www.apple.com/shop/product/MJ1M2AM/A/usb-c-to-usb-adapter?fnode=089d8170ad67386704a5265b465005f52621b9a0e57605b1866977317f83e0de4b437731035b2463996460192871bfc229443be75be8d14b8d7350ed1dc9c61ad766e224dc914b56f994a008321b11926e94ab6c0fa15a539e775265cdc777938bbe263f2db9378f65e7d3d9c65ffcb0&fs=f%3Dadapter%26fh%3D4595%252B45b0

That is working as designed.

This "arrangement" pane from Displays preferences shows how it is working. The external display is concatenated along an edge (which you can change top bottom left right) for a huge "Extended Desktop". The cursor moves freely across the boundary between displays, and can drag a window partway or all the way to the other display.

The large blue rectangles are Icons, proportional to display resolutions, that can be dragged to to allow repositioning. The menubar is also an icon that can be dragged to a different display.

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The 'other way' of using displaysis called "Displays have separate spaces". It is an offshoot and generalization of the concept of having separate spaces you can use in Mission Control. It just pushes the separate spaces one more level to assign a space to a display, and each can be separate.

The Apple ThunderBolt-3 <-> ThunderBolt-2 adapter works ONLY for genuine ThunderBolt displays, and NO others are possible.

Lacking a ThunderBolt symbol on the input cable, that appears to be a Mini DisplayPort input. Apple does not make the correct adapter for it, but third parties do.

It would be sold as a USB-C to Mini DisplayPort adapter.

You need not connect the USB-A input unless you want a brightness slider on the Mac (you can use the brightness buttons on the display) or if you want to use the USB-A Hub on the display.

The MagSafe is not required, and can not charge a newer USB-C MacBook Pro.

what Model-year MacBook Pro?

The original picture you posted shows symbols on each of the display input cables (except the MagSafe, whose distinctive shape tells you what kind it is).

A Thunderbolt Display features a ThunderBolt symbol on the input.

Your shows a Mini DisplayPort input symbol, sort of like this:

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The Apple ThunderBolt-3 <-> ThunderBolt-2 adapter (which you appear to be using in a later picture) has a ThunderBolt on it. That adapter supports ONLY Genuine ThunderBolt displays. No other types of displays can possibly work through that adapter.

Yes. here is one:

Monoprice Select Series USB-C to Mini DisplayPort Adapter -- Product # 24273 -- $23.39

There are many more available The best are rated for 4K operation or better.

Hi,

I think it should be working. What does System Preferences > Display say?