Mac zap pram os x

Reset the PRAM

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Name required. All of these activities can write new data to the parameter RAM. Writing data to the parameter RAM isn't an issue in itself, but it can be a source of problems when you change multiple items on your Mac. Likewise, if you select a startup volume and then later physically remove that drive , the parameter RAM may retain the wrong startup volume information.

One easy fix for many issues is to simply reset the parameter RAM to its default state. This will cause some data to be lost, specifically the date, the time, and the startup volume selection. Luckily, you can easily correct these settings using your Mac's System Preferences. That's four keys: the command key, the option key, the letter P, and the letter R.

You must press and hold these four keys before you see the gray screen during the startup process. Continue to hold down the four keys.

How, When, & Why to reset the PRAM & SMC on your Mac

This is a long process, during which your Mac will restart on its own. Your Mac will finish the startup process.

How to reset your Mac's NVRAM, PRAM, and SMC

While you still hold down the usual four keys, you no longer have to wait for a second reboot or listen carefully to the startup chimes. To use this method you must be able to boot your Mac and log in. Once the desktop is displayed perform the following:. Once your Mac finishes starting, you can use the System Preferences to set the time zone, set the date and time, select the startup volume, and configure any display options you wish to use. To do this, click the System Preferences icon in the Dock.

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To configure display options , click the Displays icon in the Hardware section of the System Preferences window. Difficulty Very easy. Steps 3. Time Required 55 seconds - 2 minutes. Sections 1. Flags 1. Member-Contributed Guide An awesome member of our community made this guide.


Introduction I had to make a separate guide for this particular MacBook Pro as it has the new Apple T2 Chip and requires a different procedure then the other Mac Laptops. Add a comment. Add Comment Cancel. Insight iPhone Cases.

Step 2 SMC Reset part 2.