If your Mac isn't going to sleep, there are several methods and common issues you can investigate to resolve the problem.

1. Check Your Sleep Settings: The first step is to ensure that your sleep settings are configured correctly. You can access these settings by heading to the Apple menu () > System Preferences > Energy Saver. Make sure that your Mac is set up to allow sleep when inactive, and that any automatic sleep prevention features are turned off. The EaseUS article provides a detailed guide on sleep settings adjustments here.

2. Preventing Automatic Sleep: If your Mac is not sleeping, it could be due to the "Prevent automatic sleeping when display is off" option being enabled. You can turn this off and try only allowing the display to turn off, detailed further in the Apple Support Communities here.

3. Applications and Background Tasks: Sometimes, background apps or services could be preventing your Mac from sleeping. Check to see if any applications are keeping your Mac awake, and consider quitting these applications to see if that resolves the issue. MacPaw's guide offers advice on what to check for apps that may interfere with sleep mode here.

4. Reboot Your Mac: It may seem simple, but rebooting your Mac can resolve many temporary issues, including problems with sleep functionality. Many users have found this solution effective. More information can be found on Reddit discussing this issue here.

5. Auto-Lock Settings: Check if your Auto-Lock settings are impacting sleep mode functionality. Navigate to 'Display & Brightness' in your settings to ensure it's set appropriately, as outlined in a Quora discussion here.

By tackling these potential issues, you should be able to troubleshoot the reason why your Mac won't sleep. If problems persist, further investigation into specific logs or system settings might be necessary, and consulting further resources or community advice could provide additional insights.

Sources

Mac won't go to sleep mode - Apple Support CommunitiesMac Won't Go to Sleep [7 Proven Ways to Fix It] - EaseUS SoftwareWhy can't I put my Mac to Sleep? - RedditHow come my MacBook won't go to sleep when I go to the Apple ...Mac won't go to Sleep Mode: How to solve this problem? - MacPawMac doesn't go into sleep mode - Ask Different - Apple StackExchangeComputer won't sleep unless done manually : r/MacOS - Reddit

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