Appleboy45
Level 1 (31 points)
Classic Mac OS

Q: Dual Booting Mac OS 9 and OS X 10.0

My iMac G3 runs Mac OS 9.1 and OS X 10.0 Cheetah. I know I can use the Start Up Disk setting, but is there a way to hold alt on start up and do this. When I do this, it only shows the hard drive and not the partitions. I believe this iMac does have the latest firmware if you are wondering.

iMac, Mac OS 9.1.x, G3 Processor and OS X 10,0

Posted on Jun 25, 2016 11:41 PM

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Appleboy45

Q: Dual Booting Mac OS 9 and OS X 10.0

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  • by K Shaffer,

    K Shaffer K Shaffer Jun 26, 2016 1:30 AM in response to Appleboy45
    Level 6 (14,234 points)
    Desktops
    Jun 26, 2016 1:30 AM in response to Appleboy45

    • Startup key combinations for Mac - Apple Support

    Note for later Macs, the commands can be different.

     

    From an older source, they suggested these:

     

    • X during startup - Force Mac OS X startup
    • option - (eventually) brings up a screen with startup volume choices
    • Option-Command-Shift-Delete - Bypass primary startup volume and seek a different startup volume (such as a CD or external disk)
    • C - Start up from a CD that has a system folder

     

    The Alt (Opt) key should work on most 'new world' macs to include dual MacOS9 & OS X models.

    This should bring up the Startup Manager list of bootable volumes. Usually works on most.

     

    Be sure to hold down the Opt (or ALT) key immediately after startup chime on Boot. And wait.

     

    Several older keyboard sequences appear in this archival page; not sure if they're helpful.

    http://davespicks.com/writing/programming/mackeys.html

     

    And general keys (not including start-up shortcuts)

    Mac keyboard shortcuts - Apple Support

     

    Not sure if you may have to reset the PRAM if this doesn't work. Been a long time

    since I had a G3 and dual booted OS9.1 & early OS X. Still have one that runs 8.6.

     

    {Looking through my archive source bookmarks, have found a few whose name and

    original URL go to completely different sites that do not have anything to do w/ Mac}

     

    Hopefully you can convince the oldster to remember 'dual boot commands' mean business.