**This article mainly applies to Intel MacBooks, however, some of these troubleshooting steps are applicable on M1 MacBooks**

If the fan on your Intel MacBook is running non-stop or if the laptop is running really slow after updating to Sonoma, please try the following troubleshooting steps:

Apple is constantly releasing new updates which may help improve the performance on the MacBook. Please make sure that the laptop is updated to the latest OS version.

- System Settings > General > Software Update > Install the latest updates.

Disabling dynamic screensavers and wallpapers.

- If you want to access your wallpaper settings, you can either right-click on your desktop and select Change Wallpaper or you can go to System Settings and select the Wallpaper section.

- Most of the wallpapers and screensavers are dynamic or moving, except the "Pictures" section. We recommend changing the wallpaper to one in the "Pictures" section. 

- After changing the wallpaper to a static one, screensaver mode needs to be inactive. To turn off screen saver, you can go to System Settings > Lock Screen > Start Screen Saver when Inactive > Set it to Never.

Reducing visual affects:

- Genie effect is mostly used while minimizing a window or application and sending it to your dock. This is not a necessary functionality on the MacBook and can be turned off by going to System Settings > Desktop & Dock > Minimize windows using > Choose Scale Effect. 

There's most likely a resource (application or browser) hogging up the laptop's CPU/memory which is causing the fan to run non-stop. When your fan is running non-stop again, please check the Activity Monitor utility to see if there's an application running in the background. You can access Activity Monitor by opening Launchpad > Search for Activity Monitor > and then you can navigate to both the CPU and Memory tabs to see if there's an application using 100% of the CPU/Memory. 

If Chrome is using up most of the laptop's CPU/memory, then we'll have to which website is causing the fan to run non-stop. If you open Chrome > Click on the 3 dots on the upper right hand side > More Tools > Task Manager, this will show you which website is using a lot of CPU/memory. If there's a certain website causing the spike, I would recommend using another browser to see if that improves the performance issue. If it's Outlook Webmail, you can try using another browser or the Outlook application.