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Lately, if I happen to get up in the middle of the night, I find the iMac waking itself with the blue screen even though I am not connected to the internet. In fact, most of the time now, I turn off the wifi when I close up for the night to prevent it from connecting. So, the iMac itself is initiating. Why? Am I infected?
iMac 21.5″ 4K, macOS 10.15
Thank you all for your suggestions. After I submitted this question, I asked on the web and someone suggested that my iMac maybe be trying to respond to bluetooth devices nearby. I have both an iPhone and a wireless HP Printer. So, I went into Power Saver and un-checked everything except "Put hard disks to sleep when possible" and I have checked only "Require password 4 hours after sleep or screen saver begins." I have also changed the Automatic Updates to simply checking for them rather than downloading them.
Thank you all for your suggestions. After I submitted this question, I asked on the web and someone suggested that my iMac maybe be trying to respond to bluetooth devices nearby. I have both an iPhone and a wireless HP Printer. So, I went into Power Saver and un-checked everything except "Put hard disks to sleep when possible" and I have checked only "Require password 4 hours after sleep or screen saver begins." I have also changed the Automatic Updates to simply checking for them rather than downloading them.
Open Console in Utilities, in search bar type wake
Make sure "Power Nap" is not enabled in "Energy Saver" system preference.
Or, if you have automatic updates enabled, it may be trying to connect to Apple's servers to download an update.
iMac waking up in the middle of the night
