Using this partial codes to share test data across all simulators in your Mac.

AppDelegate.m

- (void)setupSharedDirectoryForMacTest {
#ifndef DEBUG
    return;
#endif
#ifndef TARGET_IPHONE_SIMULATOR
    return;
#endif
    NSLog(@"--------------------------------------------------------------------------------------------------------");
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSError *err;
    NSString *macUser = [[documentPath componentsSeparatedByString:@"/"] objectAtIndex:2];
    NSString *sharedRoot = [[NSString stringWithFormat:@"/Users/%@/SIMULATOR/", macUser] stringByAppendingPathComponent:[[NSBundle mainBundle] bundleIdentifier]];
    if (![fileManager fileExistsAtPath:sharedRoot]) {
        [fileManager createDirectoryAtPath:sharedRoot withIntermediateDirectories:YES attributes:nil error:&err];
        assert(!err);
    }
    NSString *applicationSupportPath = [NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    if (![fileManager fileExistsAtPath:applicationSupportPath]) {
        [fileManager createDirectoryAtPath:applicationSupportPath withIntermediateDirectories:YES attributes:nil error:&err];
        assert(!err);
    }
    NSString *applicationSupportPathForMainBundle = [applicationSupportPath stringByAppendingPathComponent:[NSBundle mainBundle].bundleIdentifier];
    NSString *logPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches/Logs"];
    NSArray *dirs = @[
                      documentPath,
                      applicationSupportPathForMainBundle,
                      logPath
                      ];
    
    for (NSString *directory in dirs) {
        NSLog(@"create symbolic link if needed: %@", directory);
        
        if ([fileManager fileExistsAtPath:directory]) {
            NSDictionary *attr = [fileManager attributesOfItemAtPath:directory error:&err];
            assert(!err);
            if (![[attr fileType] isEqualToString:NSFileTypeSymbolicLink]) {
                [fileManager removeItemAtPath:directory error:&err];
                assert(!err);
                NSLog(@"REMOVE DIRECOTRY BECAUSE ITS TYPE IS: %@", [attr fileType]);
            }
        }
        if (![fileManager fileExistsAtPath:directory]) {
            [fileManager createSymbolicLinkAtPath:directory withDestinationPath:sharedRoot error:&err];
            assert(!err);
            NSLog(@"CREATE SYMBOLIC LINK FOR %@", directory);
        }
    }
    NSLog(@"--------------------------------------------------------------------------------------------------------");
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [self setupSharedDirectoryForMacTest];
    ......
}