Is (finally) CleanMyMac X safe and effective?

I'm sorry, but I must respectfully disagree with SeaPapp. I have used CleanMyMac for many years, and have never had a problem with it. (And I've used it on various Macs, including my new M1 MacBook Air). I don't think you need to use the junk cleaning option nearly as often as they recommend, unless you are running low on disk space. The uninstaller module is really excellent at deleting most traces of all those apps you downloaded and don't now need. It would be expensive for that on its own, though.

CleanMyMac has now had the Universal app treatment for M1 Mac, running natively on this processor. It also removes all the Intel code from those Universal apps which is now just clogging up space. You can also delete all those language files that you don't need. You will be amazed at how much disk space you can reclaim just using these two options!

CleanMyMac definitely does not "brick your Mac", it seems to me an extremely well coded app. I don't have any connection with this company, and admit it is expensive, even with all its modules. But I would not be without it.

The only facts I can offer are the hundreds of scammed user issues on here, search for threads containing CMM and you should have enough data. Why does Apple allow it to be on the app store? You'd have to ask Apple.

As I said before the only safe alternative is macOS itself. If you keep the OS up to date, use some common sense about where and how you click and back up your data faithfully you should have no problems, you especially won't have any problems that scamware like CMM would fix.

Are there any AntiVirus, Disk Cleaner, Optimizers, Defrag, VPNs etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS. The Built-in Security of Big Sur is all that is required.

Have seen many a person say these Third Party %^&ware saved some space and ended up have Major Issues afterwards that required Re-Installing the OS.

Whether the advise is taken to remove the ^^%$ware and avoid the invitation to disaster is entirely up to the User but one has been cautioned of the pitfalls

Clean My Mac X, known around here as brick my mac, is less than useless and should be uninstalled. I would never use any third party apps that pretend to clean up, tune up, speed up or otherwise optimize a mac.

I wouldn’t use that app. I once tried to help someone update their computer and the update bricked. That person also had cleanmymac x. I updated without the app and it worked. Don’t use it, it’ll just break your computer. However, if you wish to use it, then just be careful. It may remove helpful files.