I prefer to use App Cleaner to uninstall apps from my Macbook. There are some other apps for removing programs completely, however, App Cleaner I like more because of its great interface and an ability to delete even remains. Here is one more great review of uninstalling apps for Mac - https://nektony.com/blog/top-5-ap…

even if your mac fits minimum system requirements, you should prepare your Mac for an update. Here is how to do it - https://nektony.com/blog/prepare-f…

I found these tips most helpful when I need to clear and speed up my Macbook.
-Remove email attachments
-Delete DMG files
-Remove the largest files on your Mac
-Clear caches and logs
-Uninstall unused applications
The detailed description of how I do it is here - https://nektony.com/blog/tips-to-clean-mac

I have found a comparison chart of duplicate file finders - https://nektony.com/uncategorized/…

I`d recommend to use a free application Funter for this purpose. Funter allows to hide or unhide files in much easier and quicker way - just by one click. https://nektony.com/products/funte…

Using Terminal to show hidden files is quite long and inconvenient. There is a free app Funter which allows to hide or unhide a file in one click. https://nektony.com/products/funte…