private void extractVersionHistory(InputStream inputStream, Metadata metadata) throws TikaException {
        try {
            NSObject rootObj = PropertyListParser.parse(inputStream);
            if (rootObj instanceof NSArray) {
                for (NSObject obj : ((NSArray)rootObj).getArray()) {
                    metadata.add(IWORKS_BUILD_VERSION_HISTORY, obj.toString());
                }
            }
        } catch (SecurityException e) {
            throw e;
        } catch (Exception e) {
            throw new TikaException("problem with plist", e);
        }

    }
All iWork 13 files contain this, so we can detect based on it
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-apple-module/src/main/java/org/apache/tika/parser/iwork/iwana/IWork13PackageParser.java