What cable or adapter do I need to connect my projector to a MacBook video out port?

Consider the HRpart Wireless HDMI Display Adapter. Here are the key details:

4K Screen Mirroring: This adapter allows you to view audio, video, and office documents from a small device (like an iPhone, iPad, or MacBook) on a larger screen (TV, monitor, or projector) without messy cables. It's perfect for presentations, meetings, and exhibitions.

Wireless and Easy Connection: Setting up this wireless HDMI adapter is straightforward. You'll need a 5V/2A power source (which can often be provided by a USB port near the HDMI input on modern TVs and projectors). If the port is occupied, a battery pack can also work.

No Need for Wi-Fi: The adapter is self-contained and doesn't require an internet connection. Once connected to an HDMI input and powered, it displays a helpful screen for easy connection. You can stream movies, videos, games, and office files from your Apple device to a high-definition TV or projector.

Compatibility: This device is more suitable for Apple devices, including iPhone models (such as iPhone 7 Plus, iPhone 8, iPhone XS, etc.), MacBook Pro, MacBook Air, and various iPad models (iPad Pro, iPad Air, iPad mini). However, please note that it does not support HDCP-protected applications like Netflix, Amazon Prime Video, Hulu, and others.

You can find this HRpart Wireless HDMI Display Adapter on Amazon 1. Keep in mind that it's designed specifically for Apple devices and provides a convenient way to mirror or cast your screen wirelessly.

you'll need the appropriate adapter from the video out on your macbook to whatever input on your projector.

For instance, I use a mini-dvi to VGA adapter and VGA cable into my projector.

You should be able to use a USB - 4 pin mini-DIN cable with this projector.

did you figure this prob out? I have virtually the same prob, except mine says "invalid source"

what are your options on the projector side?
Your Mac comes with a DVI (Digital Visual Interface) port.
Attach the DVI to VGA adapter to the VGA connector of the external monitor.

depending on the external monitor/projector, you may need different adapters.

HI.... ........YO U NEED A ADAPTER WHICH IS CALLED MINI-DIV TO VGA ADAPTER....THIS ADAPTER WILL HAVE TWO PORTS ONE PORT IS CALLED MINI-DIV PORT ANOTHER PORT IS CALLED VGA FEMALE PORT (WIDER THAN DIV PORT)..NOW PLUG THIS DIV PORT TO YOUR MACBOOK AND THE OTHER ONE IN YOUR PROJECTOR ...YOU MAY ALSO NEED A VGA CABLE..

You may need a certain connection (MiniDisplay Port to DVI, or MiniDisplay Port to VGA). If you're connecting to an HDMI-compatible projector, you'll need an adapter. You'll also need an adapter if connecting your MDP (MiniDisplay Port) to a DVI or VGA port. Here are some helpful links:
#1 MDP Adapter Video (YouTube)
#2 MDP to HDMI Adapter (RadioShack)
#3 MDP to VGA Adapter (Apple Store)
#4 MDP to DVI Adapter (Apple Store)

http://www.radioshack.com/product/index.jsp?productId=3898890&CAWELAID=447271885

http://store.apple.com/us/product/MB572Z/A

http://store.apple.com/us/product/MB570Z/A

use s video cable

For these types of projectors if you're planning to hook it up using you MacBook ;

You will need a converter ( from VGA to DVI )
Using the VGA cable that came with the unit when purchased ;

Connect the VGA cable on the back of the Projector and on the other of the cable you will connect the converter ( VGA TO DVI ) since for MAC systems it has DVI ports for monitors not VGA...

You can purchase the converter at any Mac store or any computer shop near you..

There's no solution. it will not connect with macbook pro or any other mac. as on the phone with all technicians and they do not know what to do. I had the unit replaced and still would not connect.