![]() Command-Tab: Switch to the next most recently used app among your open apps.Space bar: Use Quick Look to preview the selected item.Control-Command-F: Use the app in full screen, if supported by the app.Control–Command–Space bar: Show the Character Viewer, from which you can choose emoji and other symbols.Learn how to change a conflicting keyboard shortcut.) (If you use multiple input sources to type in different languages, these shortcuts change input sources instead of showing Spotlight. To perform a Spotlight search from a Finder window, press Command–Option–Space bar. Command–Space bar: Show or hide the Spotlight search field.To close all windows of the app, press Option-Command-W. Command-O: Open the selected item, or open a dialog to select a file to open.To minimize all windows of the front app, press Option-Command-M. Command-M: Minimize the front window to the Dock.To view the front app but hide all other apps, press Option-Command-H. ![]() Command-H: Hide the windows of the front app.To find the previous occurrence, press Shift-Command-G. Command-G: Find Again: Find the next occurrence of the item previously found.Command-F: Find items in a document or open a Find window.In some apps, you can undo and redo multiple commands. You can then press Shift-Command-Z to Redo, reversing the undo command. Command-V: Paste the contents of the Clipboard into the current document or app.Command-C: Copy the selected item to the Clipboard.Command-X: Cut the selected item and copy it to the Clipboard.Plug the power cord back in, then turn on your Mac.Shut down your Mac, then unplug the power cable.If you have an iMac, a Mac Mini, or a Mac Pro, resetting the SMC is dead simple: Press and hold the power button for five seconds, then re-connect both the battery and the power.If you have an older MacBook with a removable battery, the keyboard shortcut outlined above will not work. Resetting SMC on an Older Mac Laptop With Removable Batteries Plug the power cable back in, then turn on your Mac.Keep all four buttons pressed down for ten seconds, then let go. Hold the left Shift+Control+Option keys down, then press and hold the power button down.Unplug the power, then shut down your Mac.If you have a MacBook without a removable battery, you can reset the SMC by turning on your computer while holding a specific keyboard shortcut. If you see a single piece of metal, with no slider for removing the battery, your battery is not considered removable for the sake of this tutorial. It’s easy to determine whether your MacBook has a removable battery: just look at the bottom. Resetting the SMC works slightly differently on older MacBooks, which offered removable batteries. If your Mac runs slowly even when Activity Monitor doesn’t show a lot of CPU usage, and you’ve tried a number of other steps, resetting the SMC might help. But problems with the SMC can also occasionally affect system performance. If any of these functions are behaving oddly, resetting the SMC could solve it. Selecting an external (instead of internal) video source for some iMac displays.Status indicator light (SIL) management.Responding to the display lid opening and closing on Mac notebooks.Responding to presses of the power button.Here’s a complete list of what the SMC does, straight from the Apple website :
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