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Xcode will allow you to create a Cocoa target of type “Shell Tool” (Project->New Target->Cocoa->Shell Tool). A Cocoa shell tool has access to the AppKit API after calling NSApplicationLoad(). This is useful if you would like to write tiny helper apps that don’t need workspace support. A simple app created this way can launch very fast.

#import <Cocoa/Cocoa.h>

int main(int argc, char *argv[]) {

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSDate *date = [NSDate date];

NSImage *buffer = [[NSImage alloc] initWithSize:NSMakeSize(100.0f, 100.0f)];
[buffer lockFocus];
[[NSColor greenColor] set]; 
    NSRectFill(NSMakeRect(0.0f, 0.0f, 100.0f, 100.0f));
[buffer unlockFocus];
NSData *tiff = [buffer TIFFRepresentation];
NSString *file = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/green.tiff"];
[tiff writeToFile:file atomically:YES];
[buffer release];

NSLog(@"duration %f", [[NSDate date] timeIntervalSinceDate:date]);
[pool release];

return 0; }