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When I'm not using it, my 2014 MBP sits plugged in, on my desk, where I use my Mini. Recently, I've noticed that when FaceBook makes a 'ping' notification in Safari on my Mini, I also get a ping coming out of the laptop.

The laptop is running 10.15.5. Apple's support page about Power Nap: https://support.apple.com/en-gb/HT204032 says nothing about Safari, but does say "During Power Nap, your Mac plays no system sounds". I suppose it's arguable whether noises from Safari are 'system' sounds.

I dare say that 'this is how it is', but I'm surprised I've never noticed it before. Does this mean that any AJAX-type webpage could be set-up to run while the computer is napping?

Or is my computer not actually napping at all?

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  • to really know you need to "cat /var/log/*.log" and see what the timestamp is of anything during "sleep mode" – Asher Jul 20 '20 at 21:37
  • I've got "System will sleep" at the time when I closed the lid, and "System will power on" when I opened it. So yes, it is sleeping. – benwiggy Jul 20 '20 at 21:52

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