External Display Acting Like A Way-Back Machine

Hi Folks-
Some weeks ago, I upgraded to Snow Leopard (late to the party, huh?). I have not used my second monitor until today. I connected it & both monitors show the desktop, including wallpaper, from before I upgraded the OS.

I turned off Mirroring & the MacBook monitor goes to the normal, but the external is stuck in 10.4.11's display from before I upgraded. Goofy, ain't it?

I rooted around in Display Preferences & could not find anything to correct this. My next logical step was to look in /User/Library/preferences. I didn't find any display plist to ditch.
I looked for any com.apple.<display> or <monitor> or any pist with the monotor's name. No luck.

Sadly, I use the large monitor for CAD & Photoshop Elements. Neither will work in the external now. (They show up & the fiels open, but the mouse is ignored.)

Do you folks have any ideas for this? Thanks very much!
Paul

Crisis Averted! Life Can Now Continue!

Hi
Please disregard the above post. I'm a dope sometimes. (Now does my User Name make sense?)
I'll post how I (accidentally) fixed this just in case someone equally in-adept at computer stuff has the same problem-

I opened System Preferences. But, instead of going to Displays, I went to Desktop. There were two windows to make desktop selections open. They were stacked on top of each other & I never saw the special one for the second monitor. I went to move the one I saw & the other one was shyly hiding behind it.

I changed the wallpaper. Voila! The folders & wallpaper from pre-upgrade to 10.6.8 were gone & the desktop was normal. Even the dock moved to where it lives now. Also, Photoshop Elements & CAD both work fine on each monitor.

I understand the part about the wallpaper being changed, but I still am clueless why my old folders were there & why they left when I changed wallpaper. I don't have any idea why CAD & PSE now behave. A bad case of MCS, I guess.

As long as everything works- I'm happy. (OK, I'll be honest. I'll waste hours just to find out how it went all apey.)

Now, back to our regularly scheduled lives ...
Peace Y'All,
Paul

I did not even think of that when I read your first post. Glad you got it working.