My MacBook Pro feels sluggish. If you’re experiencing similar performance with your Mac you may want to continue cleaning the hard drive. What does it mean to clean your Mac? How does this help? We’re so glad that you asked.
What is a Mac Cleaner and why do I want to clean my Mac? When you install an app or software on your Mac, the software is part of a package of files. In here are also permissions that tell OS X what users can do with what things. Many things you install in Mac OS X are installed from package files (the filename extension is “.pkg”). When something is installed from a package file, another file known as the “Bill of Materials” file (whose filename extension is “.bom”) is stored in the package’s receipt file. This receipt file is kept in /Library/Receipts/ in Mac OS X v10.5 or earlier. These files don’t take up a lot of disk space and you should not put them in the Trash. Each of the “.bom” files holds a list of files installed by the package along with the proper permissions for each file. As you use your Mac and as time passes these permissions can get changed. This can cause your Mac to lag, freeze, or crash. A quick fix is using the Disk Utility to repair your permissions. The Disk Utility is already in your Mac. Disk Utility reviews each of the .bom files in /Library/Receipts/ and checks the list to the permissions on each file. If the permissions differ between the files and the .bom /Library/Receipts/ then the Disk Utility tells you the difference. If you want to correct the differences you can do that with the Repair feature. Here is a summary of what we just discussed.
To launch Disk Utility navigate to: Macintosh HD > Applications > Utilities > Disk Utility. After that click on your hard drive from the left panel of the Disk Utility window. Keep your hard drive selected and then click the Verify Disk Permissions button. The Disk Utility will scan your drive and look for permissions that are out of incorrect. This will take a few minutes. You’ll be able to see the discrepancies that the Disk Utility has found. When the scan is complete, you will see the permissions issues found in in the middle of the Disk Utility window. To repair these problems, click the Repair Disk Permissions button. Disk Utility will scan again and repair the permissions problems. Once this is done you close Disk Utility. Your Mac should run a little faster now.