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Choose Preview, Adobe Acrobat Reader, or another app as the default for all PDFs on Mac, or open one PDF in a different app.

Turn on secondary click on a Mac trackpad, Magic Mouse, Magic Trackpad, standard mouse, or use Control-click when you need a right-click menu.

Rotate one PDF page or every page on Mac in Preview, save the change permanently, rotate for printing only, and fix pages that revert.

Run Windows software on Mac using CrossOver, Parallels, VMware Fusion, or Boot Camp on Intel Macs, with notes for Apple Silicon and licenses.

Reset NVRAM/PRAM on Intel Macs, understand Apple Silicon automatic handling, know which settings reset, distinguish SMC reset, and confirm it does not affect files.

Restart a frozen MacBook safely, distinguish a true freeze from a stuck app, force restart Apple Silicon or Intel models, reset SMC on Intel if needed, inspect Activity Monitor and Console, update software, and run Apple Diagnostics.

Restore individual files, a whole Mac, or selected data from Time Machine using Finder, Setup Assistant, Recovery, or Migration Assistant, with notes for network backups and corrupted backup drives.

Show, hide, rearrange, and remove Mac menu bar icons, manage Apple system icons in Control Center, handle third-party icons, overflow, notch behavior, and optional menu bar organizer apps.

Record, pause, rename, trim, enhance, organize, share, and sync Voice Memos on Mac using the built-in app and iCloud.

Record the whole screen, a selected portion, or a window on Mac with Screenshot toolbar or QuickTime, choose microphone and save location, show clicks, stop recording, trim MOV files, and understand audio limits.