Mac OS X: How to set memory use for Classic Applications
As with Mac OS 9, you can set the memory used by a Classic application in Mac OS X. This document does not apply to Mac OS X native applications (Carbon- and Cocoa-based applications), for which Mac OS X automatically allocates memory as needed.
This document applies to Mac OS X versions 10.2.8 and earlier. For Mac OS X 10.3 Panther or later, see Adjusting the memory allocation for the Classic environment.
As with Mac OS 9, you can set the memory used by a Classic application in Mac OS X.
Select the application and choose Show Info from the File menu. Choose Memory from the pop-up menu and type the amount of memory to use.
Application Memory
You can increase the available memory allocated to a Classic application by selecting the application in the Mac OS X Finder and choosing Get Info (10.2) or Show Info (10.0 to 10.1.5) from the File menu. This will display an info window that has a disclosure triangle labeled Memory. Click on the disclosure triangle to reveal and modify the memory settings for the application. Some applications report that they require more memory when opened in Classic, than when they are used with Mac OS 9. Increasing the memory settings for the application as described here will allow those applications to be open in Classic. You can view the memory usage for open Classic applications with Classic System Preferences.
Classic System Preferences
Classic System Preferences provides a tab labeled Memory/Versions and when selected displays information about the Classic environment similar to what is displayed by Mac OS 9 when you choose About this Macintosh from the Apple menu. A scrolling list of active Classic applications and their memory usage is displayed, and a checkbox controls whether background only applications will appear in this list. This tab also displays information about the installed versions of the Classic environment.
Temporary Memory
In Mac OS 9, application memory uses the same memory area as temporary memory. Because some applications use a large part of temporary memory, Classic does not use all of its 1024 MB of virtual memory as temporary memory. Instead, when you start Classic, it creates a temporary memory area. The maximum size of temporary memory is currently limited to somewhat less than 128 MB, or even less on computers with less than 128 MB of physical memory (RAM).
CD-Based Classic Application Requires More Memory
If a Classic application located on a CD-ROM (or other read-only media) requires an increase in application memory, first copy the application to your hard disk. Increase the memory setting of the application that is on the hard disk, and open the software from that location instead of from the CD.
Note: The information in this document comes from Mac Help, the help system included with your computer. It is based on Mac OS X 10.0 to 10.2. If a different version is installed on your computer, choose Mac Help from the Finder's Help menu. Updated or expanded information may also be available in other Knowledge Base documents.
This document applies to Mac OS X versions 10.2.8 and earlier. For Mac OS X 10.3 Panther or later, see Adjusting the memory allocation for the Classic environment.
As with Mac OS 9, you can set the memory used by a Classic application in Mac OS X.
Select the application and choose Show Info from the File menu. Choose Memory from the pop-up menu and type the amount of memory to use.
Application Memory
You can increase the available memory allocated to a Classic application by selecting the application in the Mac OS X Finder and choosing Get Info (10.2) or Show Info (10.0 to 10.1.5) from the File menu. This will display an info window that has a disclosure triangle labeled Memory. Click on the disclosure triangle to reveal and modify the memory settings for the application. Some applications report that they require more memory when opened in Classic, than when they are used with Mac OS 9. Increasing the memory settings for the application as described here will allow those applications to be open in Classic. You can view the memory usage for open Classic applications with Classic System Preferences.
Classic System Preferences
Classic System Preferences provides a tab labeled Memory/Versions and when selected displays information about the Classic environment similar to what is displayed by Mac OS 9 when you choose About this Macintosh from the Apple menu. A scrolling list of active Classic applications and their memory usage is displayed, and a checkbox controls whether background only applications will appear in this list. This tab also displays information about the installed versions of the Classic environment.
Temporary Memory
In Mac OS 9, application memory uses the same memory area as temporary memory. Because some applications use a large part of temporary memory, Classic does not use all of its 1024 MB of virtual memory as temporary memory. Instead, when you start Classic, it creates a temporary memory area. The maximum size of temporary memory is currently limited to somewhat less than 128 MB, or even less on computers with less than 128 MB of physical memory (RAM).
CD-Based Classic Application Requires More Memory
If a Classic application located on a CD-ROM (or other read-only media) requires an increase in application memory, first copy the application to your hard disk. Increase the memory setting of the application that is on the hard disk, and open the software from that location instead of from the CD.
Note: The information in this document comes from Mac Help, the help system included with your computer. It is based on Mac OS X 10.0 to 10.2. If a different version is installed on your computer, choose Mac Help from the Finder's Help menu. Updated or expanded information may also be available in other Knowledge Base documents.
| Related Documents | ||
| 106386 | Mac OS X: How to View Memory Usage and Installed RAM | |
| 106415 | Mac OS X: How to View Memory Usage with the "top" Utility | |
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