I have three magic mouses. Each and very one of them is turtle slow making them nearly useless. Trying them n and off adjustments in setting etc do nothing to improve their performance. You can't use them for gaming at all. I like the way they fit in your hand and like the scrolling with your fingers action of the device but it's so slow I hardly ever use it. I'd use it all the time off Apple would fix this problem.
iMac 27″, macOS 14.2
Could it be that it's your iMac that may be the issue, and not these mice?
I suggest that you run an EtreCheck report, and optionally post it here, in you need assistance with interpreting its results. EtreCheck is a diagnostics tool, developed by a valued forum member, that greatly aides in troubleshooting difficult Mac problems.
Ref: Using EtreCheck to Troubleshoot Potential… - Apple Community
Could it be that it's your iMac that may be the issue, and not these mice?
I suggest that you run an EtreCheck report, and optionally post it here, in you need assistance with interpreting its results. EtreCheck is a diagnostics tool, developed by a valued forum member, that greatly aides in troubleshooting difficult Mac problems.
Ref: Using EtreCheck to Troubleshoot Potential… - Apple Community
Slow Magic Mouse
