Resolution on Mac Pro w/o attached monitor

[adr1974]

Question -- tried googling, but to no avail. I have a Mac Pro 1,1 that I'm using without an attached monitor (has an ATI 4870 GPU)...I'm using either Apple's screen sharing, or LogMeIn. I can't get the screen resolution any higher than 1680 x 1050 (or something like that). Anyone know how to get around this, or why this happens? Thanks in advance.

 

[adr1974]

never did figure out an answer to this...anyone?

 

[ActionableMango]

I don't know. Have you tried third party software like SwitchResX yet?

 

[ashman70]

Perhaps that was the highest res of the last monitor you had connected and thats all the Mac can remember? Not sure.

 

[adr1974]

Appreciate the responses, guys. I haven't tried the software -- will do so now and report back. As far as the last monitor is concerned, it was a 2560 x 1440.

 

[papoopeepoo]

The G5 I use as a headless server at home defaults to the resolution of the last used screen when I control it using Screen Sharing.

I'm not sure how it would work if there was never a monitor connected, sorry.