Mac Geek Gab — Apple Tips, Tricks, and Troubleshooting

Hey ChatGPT: Are You Sure?

4 snips
Aug 18, 2025
Discover quick tips to transform screenshots into PDFs and improve your document scanning skills. Learn why most Macs can't handle 20Gbps USB and get the lowdown on better CarPlay cables. Dive into the battle between Apple Music and Spotify, exploring playlist strengths and audio quality. Troubleshoot blank email previews and keep your U.S. number while abroad. Plus, uncover strategies to negotiate lower mobile and ISP bills, ensuring your Apple devices run smoothly!
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ADVICE

Make Screenshots Into A Single PDF

  • Select multiple screenshots in Finder, right-click, choose Quick Actions → Create PDF to combine them instantly.
  • Rename the new PDF and delete the original screenshots if you no longer need them.
INSIGHT

Apple Uses Randomized Serial Numbers

  • Apple randomized serial numbers starting with devices introduced with the purple iPhone 12, making third-party model lookup unreliable.
  • Only Apple retains a searchable serial-to-model database, likely for security reasons.
ADVICE

Crop Scans Precisely With Tap-and-Hold

  • When cropping scans on iPhone, tap-and-hold near a crop corner to move it while the app zooms the area and your finger doesn't block the view.
  • Use this for precise edges instead of dragging directly on the tiny corner handle.
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