Apple Macintosh LC 630 DOS - Manual (Page 103)

The Mac OS is running out of memory even though I’m not running any PC programs.
When sharing memory with the PC environment, the Macintosh allocates a
portion of its memory to the PC. Because of this, the Mac OS may not be able
to load all your system extensions, including the PC Setup control panel.
If this problem occurs, try the following:
m Add memory to the DOS-compatibility card, as described in Appendix B.
m Decrease the shared memory setting.
m Remove PowerTalk and QuickDraw GX from the Extensions folder inside
the System Folder.
m Remove any other system extensions you don’t need.
m Change the name of the PC Setup control panel to !PC Setup so that it
loads first.
Shared memory assigned to the PC isn’t available to the Mac OS until you
turn off the PC. If the previous suggestions don’t solve your problem, click the
Off button at the top of the PC Setup control panel and restart the Macintosh.
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