"useractivityd" constantly uses more and more memory

I wasn't aware of that.

There may be something else that you need to be aware of, but are not. It's material to the solution of your problem.

This discussion raises the question of whether or how you should rely on "etrecheck" to solve a technical problem. The merits of "etrecheck" are therefore directly on topic.

Discussion of the merits of third-party software are, of course, a normal part of the content of this site. One view has been expressed by others. This is my view.

One of the rules of ASC is that you should test your advice before giving it to others. I complied with that rule.

In order to be able to answer questions such as yours, I ran "etrecheck" under safe test conditions. It told me that I had a "possible adware infection," and recommended that I run an "anti-malware" product. There was no adware. I know (from what I've learned on this site) that the recommended anti-malware product is ineffective, and I also know (from my own tests of several kinds of adware) that I wouldn't need any such software to deal with an adware infection if I had one.

The version of "etrecheck" that I tested produced false warnings and made unhelpful recommendations. For those reasons, I will never use it again, nor will I advise anyone else to.

Hello asgertler,

Now you know the reason for that big disclaimer when you copied your EtreCheck report. While this is an Apple web site, it is still the internet and anyone can post anything. Your EtreCheck report clearly indicated where the problem lies and has led to a number of very similar problems and suggestions for correcting it. You have already tried one suggestion that did not come from your EtreCheck report and it failed. I'm confident that EtreCheck has done its job by focusing your attention on the actual problem and actual solutions. I would like to see the results of those other suggestions from both StackOverflow and the other ASC thread before making any other suggestions.

As this discussion raises the topic of which suggestions you should consider following, consider this. EtreCheck does not report any "possible adware infections". It does not recommend that you run any "anti-malware" products. EtreCheck is capable of removing adware on its own. But the relative effectiveness of various "anti-malware" products is completely off-topic to your problem. EtreCheck did not report any adware and, until now, no one has seen the need to even bring it up. If people want to test old versions of software products, and never download any updates, and then complain about it, I suppose there is nothing I can do to stop them. But is that the kind of advice you want to listen to?

I am also having this issue and have checked in guest and safe mode, still with the same useractivityd issues. Have you resolved your problem?

I actually just started experiencing this problem myself. if you or anyone else has found a solution, please let me know!