AMITIAE - Tuesday 21 October 2014
System Preferences in OS X 10.10, Yosemite: Desktop & Screensaver
By Graham K. Rogers
DesktopThe way the desktop images are displayed remains the same. In earlier versions of OS X, selecting a desktop picture would display that image on every desktop or space as Apple now calls them (see Mission Control). Since OS X 10.9, Mavericks, each space can have a separate desktop picture.
The Desktop pane is in two main parts. At the top left is the current desktop image displayed as a thumbnail. This changes if the user works in another space which has a different desktop picture allocated. The name of the picture is shown just to the right of the thumbnail panel.
A button below the name shows 5 methods for the display of the image: Fill Screen, Fit to Screen, Stretch to Fill Screen, Center and Tile. Depending on the image selected, using one of these options may produce a better display.
iPhoto albums are also included, giving access to a user's own photographs. As I use Aperture I added these albums. Below these two menu items are Pictures folders. Using a + icon at the bottom of the panel a Finder panel opens and we may also add our own folder selections. The - icon removes unwanted folders. It may also be possible to see icons for outside sources, such as Facebook or Flickr.
When any folder is highlighted, the available images in that folder appear in the main panel. Clicking on any picture makes that the desktop picture for the current space. The picture also appears as a thumbnail but will change as a new space is accessed. There is no Undo button.
If the Change picture box below the panel is checked, the Random order item below becomes available. When the checkmark in the Change picture box is removed, the picture originally selected may not be shown if a different album has been accessed.
Screen SaverThe Screen Saver panel is unchanged from the way it was in OS X 10.9, Mavericks Slideshows and Screen Savers are shown as a single group of 21 options.
The top 14 options are the same as the slideshows available before, although on my installation there is a slightly changed order: Floating, Flip-up, Reflections, Origami, Shifting Tiles, Sliding Panels, Photo Mobile, Holiday Mobile, Photo Wall, Vintage Prints, Ken Burns, Classic, Scrapbook and Snapshots. Thumbnails of the slideshows are shown in the left hand panel.
Twelve of the fourteen use the Ladybug desktop picture as illustration. The icons have some subtle display changes, but their content is mostly the same. Scrapbook and Snapshot use mini image icons, but these two options were not available on my older iMac.
Users may also choose from the Library or any suitable folder. As a source is selected, so a slideshow of sample images is displayed in a small window above the selector button. A checkbox below the button allows shuffling of image order.While Snapshot (using the same sources as the other screensaver types) did work, I was not able to make the Scrapbook screensaver work.
When a screen saver is selected, a preview appears in the window to the right. A button below for Options, when available, can be pressed. These are not the same for each screen saver:
There are three additional controls at the bottom of the screen: a button for selection of the time to start the screen saver (Never and time intervals from 1 minute to 1 hour); a checkbox for "Show with clock"; and a button for Hot Corners.
This opens a panel which has four buttons for actions to be started when the cursor is moved to the four corners of the screen. In my case, I use top right to Put Display to Sleep; and bottom right to Start Screen Saver. Actions available are
NoteIn an article put out a couple of days after the release of OS X 10.9, Mavericks, Thorin Klosowski, writing on LifeHacker, pointed out that images provided for screen-savers (such as the National Geographic images) could also be used as desktop wallpapers. That article is still available online.
As above, this may be done by using the + icon at the bottom of the Desktop panel. In the Finder panel that opens we may use the Finder menu to access the /Library/Screen Savers/Default Collections/ and add any folders required. [Klosowski writes that the images could be copied using the Finder, but they are accessible this way as well.]
Graham K. Rogers teaches at the Faculty of Engineering, Mahidol University in Thailand where he is also Assistant Dean. He wrote in the Bangkok Post, Database supplement on IT subjects. For the last seven years of Database he wrote a column on Apple and Macs.
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