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sleep wake – Macbook Air – battery drains while sleeping (but not when shut down) – via: Ask Different

Posted by jpluimers on 2017/08/07

I had the same issue as in sleep wake – Macbook Air – battery drains while sleeping (but not when shut down) – Ask Different which suddenly introduced itself in April 2016 after I had been running El Capitan (OS X 10.11) for a while.

The Mac didn’t have PowerNap active as I verified using How Power Nap works on your Mac – Apple Support

At first it looked like an SMC reset worked as explained by Reset the System Management Controller (SMC) on your Mac – Apple Support and mentioned in Mac Air loses 90% of battery overnight when in … | Apple Support Communities.

The Mac is indeed running Chrome, but I don’t like to turn that off before sleeping.

Executing pmset -g would show hibernatemode 3.

So I opted for the hibernate option as mentioned in the first link:

sudo pmset -a hibernatemode 25

This will take a bit longer to restore the memory from hibernate state, but saves a lot of frustration.

–jeroen

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