Honestly, just use DaisyDisk and delete crap you don't need. Any other cleaning utility at best will free some space and at worst mess up your computer. You can, however, use the new built-in tool found in Sierra. On that note, I did find that my computer is much faster on Sierra now that a bunch of hidden background processes from old apps I forgot I use are disabled.OT: Which cleaning & maintenance utility is best for Mac? What do you all use?