AMPDevicesAgent is showing it's using 94.8 % of my iMac CPU

If an iPhone, iPad, or iPod is connected, disconnect it and see if the CPU usage drops. Sometimes, connection issues or sync problems can cause AMPDevicesAgent to overwork the CPU.

Hi Kenny,

Basically, AMPDevicesAgent is a new device manager. It is used for backing up, restoring and updating your devices. This may appear: When you sync your devices over Wi-Fi. When you connect your iPad or iPhone for the first time to your Mac with a USB cable.

what is AMPDevicesAgent - Apple Community

Take care my friend, if it doesn't calm down post back.:)