I have an old Dell screen from an equally old PC, and it only takes VGA input. Conversely, I have a MacBook Pro which only has a HDMI port. So I bought a VGA -> HDMI adapter and attached it, then plugged the HDMI end into the laptop (as usual) with the monitor's power on. The laptop adjusted its inbuilt screen to fit the older monitor but the problem is that nothing came up on the monitor. Does anyone know what is happening and how to fix it?
Also, in the 'Display' System Preferences it says that it is hooked up to the Dell monitor and lists it as the current option, and when I press any button on the monitor it says:
"In Power Save Mode
Press Any Key Keyboard or Move Mouse"
After searching I found info that suggested using
system_profiler SPDisplaysDataType to analyse connected displays, this is the result (for both inbuilt screen and monitor:
Color LCD: Display Type: Retina LCD Resolution: 2560 x 1600 Retina Retina: Yes Pixel Depth: 32-Bit Color (ARGB8888) Mirror: On Mirror Status: Hardware Mirror Online: Yes Built-In: Yes DELL E173FP: Resolution: 1280 x 1024 @ 60 Hz Pixel Depth: 32-Bit Color (ARGB8888) Display Serial Number: F504545M5H9U Main Display: Yes Mirror: On Mirror Status: Master Mirror Online: Yes Rotation: Supported Television: Yes
not sure if it will help, but it shows that it thinks it is connected.