Need Hotkeys for Mac startup

curiouswebster
curiouswebster used Ask the Experts™
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Need Hotkeys for Mac startup

I left my MacBook (2013) Mojave to go to sleep last night. This morning, I forgot that and started up. But, the cursor stopped moving when I tried to log in.

I hard rebooted by pressing and holding the start button. On restart, it went into the mode where I am prompted to se the language. It was like the hard disk crashed.

So, I took it to MicroCenter where a restart brought up that same language selection window. But the guy press four keys on startup and the Password window came up, and it functioned like normal.

What keys did he hold down?

It seems like that would be a smart thing.

He said I let the PC go to sleep and that causes lots of temp files to be created, which overwhelmed the system.

First, what are those key strokes?

Second, is his explanation making sense to you?

Thanks
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It was probably the SMC reset or PRAM reset.

If you plugged in power, turned off the laptop and held the left shift control option and the power button, it resets the SMC.

If you just turn on the computer and press command option p r, then it was the PRAM reset.
curiouswebsterSoftware Engineer

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Commented:
what does PRAM reset do?
curiouswebsterSoftware Engineer

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Commented:
thanks

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