Should I update in the context of security? I suspect that it will be one of the last updates for HS. Is it possible that even in the near future, Apple will force me to install another OS or "buy a new Macbook", or even worse, install something without my permission, rendering my current Macbook and High Sierra unusable? After all, if I do this 2020-003 update, I can no longer refuse or block anything when they want to install something !? As at that time e.g. the hidden performance slow-down on older iPhone types (battery issue). I don't have to think about this! After all, I would have to throw my MacbookPro away. This would be outrageous.