Photos in your System Photo Library are available in apps like iMovie, Pages, and Keynote. You can also sync them to iOS devices and view them on Apple TV. And if you want to use your own images as your desktop picture or screen saver, the images need to be in your System Photo Library before you can select them in System Preferences.
If a process makes repeated calls to semopen, with the same name argu-ment, argument, ment, the same descriptor is returned for each successful call, unless semunlink has been called on the semaphore in the interim. If semopen fails for any reason, it will return a value of SEMFAILED and sets errno. On success, it returns a semaphore. Sep 27, 2016 A lot of Mac tutorials mention the Library folder, which is where your macOS applications store things like settings and caches. Some settings can only be changed by editing files in the Library. But the Library is hidden by default.
Jul 09, 2018 To view another Mac user account’s logs located under “User Reports” or “/Library/Logs,” you’ll have to sign in as that user and then open the Console app. You can copy data from your system logs to a text file, if you need to export it to share it with someone else for troubleshooting purposes. Jan 12, 2020 Make the Library Visible Permanently. Apple hides the Library folder by setting a file system flag associated with the folder. Any folder on your Mac can have its visibility flag turned on or off; Apple just chose to set the Library folder's visibility flag to the off state. To reset the visibility flag, do the following: Launch Terminal. ⌘-Shift-G is the hotkey for the 'Go to Folder' dropdown menu. Just type in /System/Library/Extensions and click Go to open that folder. I think your screenshot may be in your User folder, not the System folder. The System folder lives in Macintosh HD, not within a specific user's files.
If you have only one photo library, then it's the System Photo Library. Otherwise, the first photo library that you create or open in Photos will become the System Photo Library. If you have more than one library, you might need to designate a System Photo Library, so other apps can access the photos and videos you want them to use.
Follow these steps to designate a System Photo Library:
- Quit Photos.
- Hold down the Option key and open Photos. One of the photo libraries is already designated as YourLibraryName (System Photo Library).
- Choose the library you want to designate as the System Photo Library.
- After Photos opens the library, choose Photos > Preferences from the menu bar.
- Click the General tab.
- Click the Use as System Photo Library button.
If you open a second or different library in the Photos app, and you haven't designated it as the System Photo Library, other applications will use photos from the original System Photo Library. Hold down the Option key when you open Photos to see which library is set as the System Photo Library.
iCloud and the System Photo Library
You can use iCloud Photos, Shared Albums, and My Photo Stream only with the System Photo Library. If you choose a different library in Photos without designating it as the System Photo Library, the iCloud tab in Photos preferences is disabled:
Mac Show Library
If you designate a new library as the System Photo Library and then turn on iCloud Photos, the photos and videos in the new library will merge with those already in your iCloud Photos. If you want to keep the contents of your photo libraries separate, don’t turn on iCloud Photos for more than one library in Photos.