![]() ![]() In early systems with 24-bit addressing, the following can be typed into the debugger: ![]() However, it is possible to invoke a debugger through command-power (or a programmer's key) to enter commands to force quit the crashed foreground application that caused the error condition. This technique is also used to escape malware pages without any harm.īecause classic Mac OS is based on cooperative multitasking instead of pre-emptive multitasking, it was common for a system error in one application to freeze the entire system, forcing the user to restart the computer. This would not allow unsaved changes to be kept such changes are only stored in memory, to be gone once the application is force quit. As a result, in order to force the program to quit, the user is left with the sole option to force the application to quit. ![]() When an application is frozen or stops behaving normally, the user may not be able to quit the application normally. The user can then choose to save or not to save the changes, and a large majority of programs also offer an option to cancel the quitting process. When an application program quits normally, the user is prompted to save any documents that have newly inputted or modified changes which have not yet been saved. In macOS and Mac OS X, the keystroke to force quit any application program (including, to an extent, the Macintosh Finder) is command-option-escape. ![]()
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