This is a useful video on how to basically wipe your operating system and re install it to hopefully fix whatever is wrong with your computer. Don't forget to backup your files.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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