8 Replies Latest reply: Nov 4, 2009 4:19 AM by Rod Hagen
Jeffrey J.J.C. Labrecque Level 1 Level 1 (0 points)
I want to use my old iMac G3 as second monitor to my MacBook Pro, how?

Thanks!

MacBook Pro 13inch, Mac OS X (10.5.8)
  • rccharles Level 5 Level 5 (6,655 points)
    Is your iMac g3 tray or slot loading. The tray loading has an apple monitor connector. You can get a converter to connect to a VGA cable/connector.

    Robert
  • Kenichi Watanabe Level 7 Level 7 (30,460 points)
    You can't really do it in any normal way; that is, using the MacBook's video output port.

    You can use this program

    http://www.screenrecycler.com/home.html

    to make your iMac screen act as a second display, over a network connection. ScreenRecycler runs on your MacBook and creates a virtual second display. It uses the open-source VNC (screen sharing) protocol to serve that second display over the local network. You then run a VNC client program (usually free) on the iMac G3 and display the MacBooks virtual second screen in a window, which you can display full screen. Your iMac then appears to be the MacBook's second screen. You use System Preferences Displays pane to set it up, as you would a real second display.

    How well this works depends on your iMac's speed, what Mac OS version it runs, and the speed of the network connection. If you connect the two directly with an Ethernet cable (Cat-5 or better), the network speed should be decently fast (at 100Base-T). If your iMac G3 has Tiger (10.4), you can use this program as the VNC client

    http://www.jinx.de/JollysFastVNC.html

    (there are free VNC clients for 10.3 and earlier)

    However, this solution will never be as fast (in terms of screen refresh rate) as a real display using a real video connection. But you can try it at no cost, to see if it meets your needs.
  • Network 23 Level 6 Level 6 (11,880 points)
    Jeffrey J.J.C. Labrecque wrote:
    I want to use my old iMac G3 as second monitor to my MacBook Pro, how?


    The only iMacs that can have video input are the new models announced today, it is a new feature. No previous iMac has a video-in capability. Your only solution is ScreenRecycler to pipe video through the network port.

    rccharles wrote:
    Is your iMac g3 tray or slot loading. The tray loading has an apple monitor connector. You can get a converter to connect to a VGA cable/connector.


    I don't think that's gonna work. He wants video into the iMac, not out of it.
  • Duane Level 10 Level 10 (117,950 points)
    The only iMacs that can have video input are the new models announced today...


    and it looks like it is only the 27 inch models.
  • rccharles Level 5 Level 5 (6,655 points)
    rccharles wrote:
    Is your iMac g3 tray or slot loading. The tray loading has an apple monitor connector. You can get a converter to connect to a VGA cable/connector.


    I don't think that's gonna work. He wants video into the iMac, not out of it.

    I was thinking he didn't want to use his iMac g3 anymore and wanted just to cannibalize the machine and use it as a display.

    Robert
  • Network 23 Level 6 Level 6 (11,880 points)
    rccharles wrote:
    I was thinking he didn't want to use his iMac g3 anymore and wanted just to cannibalize the machine and use it as a display.


    Yeah, I know, but are you saying there was ever a way to pipe video into an iMac G3 via the slot which I believe you are thinking of as the unsupported mezzanine slot? I thought the only products ever available (and now nearly impossible to find) sent video out of that slot. (This is probably all ancient history to the original poster)
  • rccharles Level 5 Level 5 (6,655 points)
    The tray loader looks like an all in one unit, but it is really two: monitor, cpu case. I mean rip off the bottom of the iMac tray loader & just use the monitor part. The monitor comes encased in plastic even with the bottom off. There is a mac video in cable for input to the monitor. You would have to buy or make a converter plug. There might be some problem powering up the monitor. This would be a hacker project.

    Robert
  • Rod Hagen Level 7 Level 7 (31,985 points)
    Bear in mind that the resolution of the iMac g3 screen (1024 x 768) is actually lower than the resolution of your 13" MBP (1280x800) .

    Even if you could do it easily it will look like crud. Far better to look for a larger, more recent CRT VGA monitor at the local op shop or school fete. You'll probably find one for not much more than the price of a packet of cigarettes these days!

    Cheers

    Rod