Input the following command (being sure to replace location/nameoffile.extension with your own filename and file path) and hit the ‘Enter’ key on your keyboard: chflags nouchg location/nameoffile.extension. Once the file is unlocked, you should be able to go ahead with the delete. In either Finder or Launchpad, you can drag app icons to the trash bin to delete the apps. (If you’re on an older version of macOS – or OS X, for the much older versions – and managing apps via iTunes, the process is similar. Select the app, right-click, and select ‘Move to Trash.’) Remove apps with the Finder. How to change the default Mac app for specific file types. Right-click on a file that uses the file type you'd like to change the default for. For example, one with a.jpg extension (a photo). Click on Get Info in the pop-up. Click Open With if the section isn't already expanded.
15 7 likes 123,761 views Last modified Mar 26, 2013 10:23 AM
Hello and welcome to my User Tip
Sometimes you have a problem with System Preferences or something related to it, like it remembering your screensaver or desktop selection, or perhaps it won't launch or launches funky.
This procedure is for deleting the 'preferences' file(s) that is located in your (hidden) User/Library folder that can resolve issues like this.
When the computer is rebooted and the associated program launched again, it recreates this file, but blank of preferences, thus since it's rebuilt it's free of problems.
This procedure also works for other programs like iPhoto or iTunes, or whatever that stores a preference file (.plist) in the (hidden) User/Library folder, the procedure is the same, just sub out the program your having problems with .plist file instead of the System Preference .plist file below.
Known preference files issues:
com.apple.systempreferences.plist (corrupted/not launching System Preferences)
com.apple.desktop.plist (corrupted/not working desktop picture changes)
com.apple.safari.plist (safari issues)
See the Steps #12 and #13 for OnyX and it's preference file checker to find other corrupted preference (.plist) files that might be causing your issues.
Remove Login Items to lower Mac memory usage. Login items are programs that load automatically. See your total CPU usage at a glance. Now you can see your total CPU usage in the application and also as a today widget in your notification panel. Build for MacBook, MacBook Air, MacBook Pro, iMac, iMac Pro, Mac Pro, and Mac mini. And it is the ideal tool for the professional, musical composition. So, this app keeps running without your knowledge and increase CPU usage. 5: Symptoms of slow Mac and high CPU usage: If your system is running slow and producing a lot of heat, that is more like due to high CPU usage. Also, its fan produces sound like it is going to take off soon. Tips: How to Diagnose a Slow Mac on Catalina. App cpu usage mac. Mac Snow Leopard offers an application called the Activity Monitor, which is designed to show you just how hard your CPU, hard drives, network equipment, and memory modules are working behind the scenes. To run Activity Monitor, open the Utilities folder in your Applications folder. To display each different type of usage, click the buttons. See real-time CPU, network, or disk status in the Dock. It’s easy to keep an eye on your system status without even looking at the Activity Monitor window—you can monitor your CPU, network, or disk usage as a live graph right in the Dock.
So we are going to delete a preference file in a hidden folder, this will only affect the preference file, not your personal files or programs.
1: Go to the Finder and select Go menu and Go To Folder
2: Now paste or type
~/Library/Preferences
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3: Press GO! and a folder will appear
4: Scroll down and find
Mac Os Delete Key
com.apple.systempreferences.plist com.apple.desktop.plist (or whatever program your having problems with)
Mac Os Delete Other Storage
5: There may be two of the same named file, drag the one you can to the Trash can
6: Restart the computer and open System Preferences (or problem program) and reset all your preferences again