MAC_OS_X_VERSION_MAX_ALLOWED is always >= 1080 now

Change-Id: Ieae67cbf917cdf4bca2b0d6c1697eddc6137dbe2
MAC_OS_X_VERSION_MIN_REQUIRED is always >= 1080 now

Change-Id: I40d03ab9acb67ab72b9047017452f069ce88fd4b