Messages Using High CPU on Mac, Slowing Performance: 6 Troubleshooting Tips
If your Mac feels excessively slow at random, or unreasonably slow for seemingly no apparent reason, you may want to check to see if the Messages app is open, as the Messages app for Mac has been known to use heavy amounts of processor and system resources. Next, you can investigate Activity Monitor for CPU utilization regarding the Messages app to confirm if this is the case.
Many Mac users have been reporting that Messages app on the Mac often uses inordinately high amounts of CPU, sometimes even maxing out the processor or otherwise consuming huge amounts of CPU, simply by the Messages app being open, whether or not you’re actively using the app. This has been an issue with many versions of MacOS system software, and it is not limited to MacOS Sonoma, macOS Ventura, Monterey, Mojave, High Sierra, etc, it can seemingly impact all Messages versions on the Mac, though the more recent versions with features like Stickers may have a greater propensity for slow performance and high CPU consumption.
We’re going to cover common reasons why Messages can slow down a Mac and lead to high CPU usage, as well as cover some solutions, and troubleshooting tips.