one little known trick for issues on a Mac is to rebuild the permissions... will fix MANY small issues and help speed it up.. pretty simple to do,..

go into the "utilities" folder in the applications folder.... inside is "Disc Utility" fire that up... over in the right bottom corner will be a few button, (check permission, repair permissions, check disc, fix disc...) just hit the "repair permissions" button... walk away, it will most likely take a little while if you've never done it before. The first time you restart after doing this there may be kinda a long delay, but after that the computer will run noticeably faster!! kinda like "rebuilding the desktop" was back in OS7-9 days if you remember that far back