How to Change How Often a Mac Screen Saver Changes

Step-by-Step Guide

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   Step 1: Open Terminal.

   You can type "Terminal" into Spotlight search to access the program. , The default length of time is 3 seconds.
   
   Copy and paste the following into the Terminal window: sudo /usr/libexec/PlistBuddy
   -c "print ':
   JustASlide:mainDuration'" /System/Library/PrivateFrameworks/Slideshows.framework/Versions/A/Resources/Content/EffectDescriptions.plist Press ↵ Enter.
   
   If prompted for your password, type it in and press ↵ Enter.
   
   The keystrokes will not appear as you type it in.
   
   Unless you have changed this setting before, a number 3 will appear, confirming that the default setting is in place. ,,, Doing so will cause your Mac to boot in recovery., Once on the recovery screen, you can open Terminal and disable SIP.,,,, It's at the top left of the menu bar.,, You can type "Terminal" into Spotlight search to access the program.,, If prompted for your password, type it in and press ↵ Enter.
   
   The keystrokes will not appear as you type it in. , Type in: sudo /usr/libexec/PlistBuddy
   -c "print ':
   JustASlide:mainDuration'" /System/Library/PrivateFrameworks/Slideshows.framework/Versions/A/Resources/Content/EffectDescriptions.plist , The number displayed should be the one you entered earlier. ,,, Doing so will cause your Mac to boot in recovery., Once on the recovery screen, you can open Terminal and disable SIP.,,,, It's at the top left of the menu bar., SIP will be re-enabled, and your screen saver adjustments will be made!
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   Step 2: Verify your current settings.

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   Step 3: Click the Apple logo at the top left of your screen.

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   Step 4: Click Restart.

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   Step 5: Press and hold ⌘ Command + R immediately after restarting.

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   Step 6: Click Utilities.

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   Step 7: Click Terminal.

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   Step 8: Type in csrutil disable.

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   Step 9: Press ↵ Enter.

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    Step 10: Click on the Apple logo.

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    Step 11: Click Restart.

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    Step 12: Open Terminal.

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    Step 13: Copy and paste the following code into the window: sudo /usr/libexec/PlistBuddy -c "set ':JustASlide:mainDuration' 10" /System/Library/PrivateFrameworks/Slideshows.framework/Versions/A/Resources/Content/EffectDescriptions.plist You can replace the "10" in the code with any number of seconds you wish.

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    Step 14: Press ↵ Enter.

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    Step 15: Type in the first code to confirm your changes.

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    Step 16: Press ↵ Enter.

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    Step 17: Click the Apple logo at the top left of your screen.

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    Step 18: Click Restart.

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    Step 19: Press and hold ⌘ Command + R immediately after restarting.

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    Step 20: Click Utilities.

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    Step 21: Click Terminal.

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    Step 22: Type in csrutil enable.

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    Step 23: Press ↵ Enter.

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    Step 24: Click on the Apple logo.

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    Step 25: Click Restart.

Detailed Guide

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