HDMI VGA projector cannot connect to Macbook Pro
After a few months of experimentation, we found no 3rd party (i.e., non-Apple branded) HDMI &lt;> VGA adaptors which worked well and some which didn't work at all on our Macs. We bit the financial bullet and purchased Apple-branded adaptors and they work perfectly.

We found the same with Thunderbolt &amp; USB &lt;> gig-Ethernet adaptors and Lightning &lt;> HDMI adaptors, too. Remember, you may save $$ purchasing 3rd-party adaptors, but there are tradeoffs in either operation or quality, frequently both.

Most 3rd party adaptors have little or no strain or twist relief in the cable attachment inside the adaptor. We had slews of non-Apple Thunderbolt &lt;> VGA adaptors die after only a week or two of use because the cables literally twisted out of the adaptor body.