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Why do some old Mac programs run slowly in Classic mode?

387 Views 3 Replies Latest reply: Nov 25, 2012 3:46 PM by BDAqua RSS
Ed Contaldi Calculating status...
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Oct 7, 2012 3:01 PM

I successfully installed OS 9 Classic Mode on an eMac.  At first, some of my old programs (Thinkin' Things, Millie's Math House, both edmark) ran fine, but as time went on they started jerking and freezing as they ran.  I re-started and it continued to do the same thing.  Any ideas on why these programs run slowly like this? 

  • BDAqua Level 10 Level 10 (114,685 points)

    Hello Ed,


    Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?


    How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.


    Open Console in Utilities & see if there are any clues or repeating messages when this happens.


    In the Memory tab, are there a lot of Pageouts?

  • BDAqua Level 10 Level 10 (114,685 points)

    Pageouts are good.


    You could use more than 9GB of free space, biy not the problem here.


    Some Classic Games will run fine, others won't run under emulation, others will be slow, some will only run booted from true OS9, & this is more true with Games than other apps, as OSX classic doesn't allow direct manipulation of video.


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