MacBook Air shutting down

When I am only listening to music from my iTunes Library, my MacBook Air (mid-2013) keeps closing down. I have gone to Energy Saver in Preferences several times and changed the settings for both the Power Adapter and the Battery to Never, but this does not seem to help. How can I keep my music listening from being interrupted frequently?

Many thanks.

Shutting down? Going to sleep? Have you noticed how long it takes for it stop? When you figure out how long, can you watch it as it begins to stop to see what's happening?

Can you post a screen shot of the SystemPreferences > Energy Saver settings/options?

Raz0rEdge said:

Shutting down? Going to sleep? Have you noticed how long it takes for it stop? When you figure out how long, can you watch it as it begins to stop to see what's happening?

Click to expand...

When only music is being played, the MacBook usually closes down after 20-30 minutes. It gives no warning, and I have not seen anything in particular happening.

Thank you.

Sorry narda, I think RazOrEdge was posing a question there. Is the device shutting down (turning off) or just going to sleep? I'm assuming you mean going to sleep but I could be wrong.
Are you using the device plugged into AC power or are you using it on battery? Note that there are different Power settings for Battery and AC Charger.
Check that if your Display is set to turn off after 30 min you will need to tick the "Prevent the computer from sleeping when display is off" box.
Alternatively turn on the Visualiser and see if that keeps it running.

My Mac is definitely shutting down. i always use it with AC. Both the battery and ac options are set to close down after three hours; the options below are all unchecked. What and where is the Visualizer? When I am not using the Mac during the day, I usually use Lock Screen. I shut it down every night.

Thank you.

Given your reply it might not have any effect but Visualiser is a graphic display which moves in time with the music being played by iTunes. You will find it in the iTunes View Menu.

Since you shut it down every night, I recommend you download, install, and run, Onyx, https://www.titanium-software.fr/en/onyx.html. Please be sure to get the correct Onyx version, to match your macOS.

When you run Onyx, use the default settings, on the Automated tab. This will run a wide range of Apple maintenance scripts that wil clean up some aspects of your system. I don’t know if it will have an affect on this issue, but it should not hurt.

The only others options, I believe may help with this issue, would be NVRAM reset, https://support.apple.com/en-us/HT204063 and SMC reset, https://support.apple.com/en-us/HT201295, be sure to read all the information in these articles.

Just one other thing, trying to think laterally, I don't suppose the device is overheating? I'm sure you would have mentioned that but just to be sure. Lastly I assume the battery is performing okay? No charging issues?