- (void) ookie: (int *) snork {
    NSLog (@"%d %d %d", snork[0], snork[1], snork[2]);
} // ookie

Or use the [] syntax:

- (void) ookie2: (int[]) snork;

or use the explicit size syntax (which doesn’t really matter for 1-D arrays):

- (void) ookie3: (int[17]) snork;

And you can pass in pointers to pointers to pass back a resized array originally allocated by malloc:

- (void) ookie4: (int**) snork
         growTo: (int) elements {

    *snork = realloc(*snork, sizeof(int) * elements);
    (*snork)[0] = 55;

    NSLog (@"(%d) %d %d %d", sizeof(snork), (*snork)[0], (*snork)[1], (*snork)[2]);

} // ookie4

Passing in arrays of Objective-C types:

- (void) ookie: (NSString **) snork {
    NSLog (@"%@ %@", snork[0], snork[1]);
} // ookie