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13 maj 2012 · Turn on the computer. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears. Hold the keys down until the computer restarts and you hear the startup sound for the second time. Release the keys.
- iMac SMC and PRAM Reset
SMC RESET . Shut down the computer. Unplug the computer's...
- iMac SMC and PRAM Reset
22 lis 2018 · Follow these instructions for resetting the PRAM/NVRAM: Reset NVRAM or PRAM on your Mac - Apple Support. Follow these instructions for resetting the SMC: How to reset the System Management Controller (SMC) on your Mac - Apple Support.
23 mar 2019 · I'm not sure where you're getting -p -r as boot args to reset NVRAM, but sudo nvram -c should do the trick on High Sierra, as Tetsujin states here. When you're done, reboot into recovery mode once more, open Terminal and then re-enable SIP with csrutil enable, and reboot into High Sierra.
29 sty 2014 · Unplug the computer's power cord and ALL peripherals. Wait 15 seconds. Attach the computers power cable. Wait another 5 seconds and press the power button to turn on the computer. PRAM RESET. Shut down the computer. Locate the following keys on the keyboard: Command, Option, P, and R.
If you're experiencing weird glitches with your Mac, doing a reset of your MacBook or desktop Mac could help. Here's how to reset the NVRAM, PRAM, and SMC on either an Intel or M-Series Mac.
25 cze 2015 · Anyways, power down your Mac, wait a couple minutes for it to fully shut down, turn it back on, zap PRAM a few times, and then hold down the Option/Alt key. Choose your Mac's startup disk and you...
2 wrz 2022 · Shut down the computer. Press the Power button. Before the grey color screen is shown, press and hold Command + Option + P + R keys simultaneously. Hold down these keys until the MacBook restarts and then you will hear the startup sound. Release the keys.
