I think my macbook's HD needs repair but the "repair" button in first aid is ommited and this msg comes out when i run verify: Verifying volume Macintosh HD Checking HFS Plus volume. Checking Extents Overflow file. Checking Catalog file. Checking multi-linked files. Checking Catalog hierarchy. %) Checking Extended Attributes file. Checking volume bitmap. Checking volume information. Volume Header needs minor repair d.",1) Macintosh HD Error: The underlying task reported failure on exit 1 HFS volume checked Volume needs repair What does that mean? And how do i fix?