If Finder doesn’t find a preferences file, it means you don’t have it. Update or reinstall macOS. Hopefully, that’s all you need to resolve the ‘“Preview.app” is not open anymore’ errors.
Could be many things, we should start with this...
- How to Open Applications Using Terminal on Mac. Apple's Terminal provides you with a UNIX command line inside the OS X environment. You can enter the open command here to open any application, or to open a file with the application of your.
- You can’t open the application ‘app name’ because it may be damaged or incomplete. The first thought was to restart the device, and when I did that, the thing went south. Now, I was not able to open any app even the system app was not working.
'Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at the top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk.'
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
How To Open My Apps On Mac
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
Can T Open Any Apps On Macbook Pro
Apr 26, 2012 2:21 AM