I hope that you enjoyed Saturday’s Mac Riddles, episode 172. Here are my solutions to them.
1: Practicality of storage in your back for first aid.
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Disk Utility
Practicality (utility) of storage (a disk) in your back (another disc) for first aid (one of its features).
2: Service repository hidden for compression.
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Archive Utility
Service (utility) repository (archive) hidden (it’s hidden deep in CoreServices) for compression (what it does).
3: Useful thing for unseen narration and accessibility.
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VoiceOver Utility
Useful thing (utility) for unseen narration (voice-over) and accessibility (it’s one of the major tools in Accessibility).
The common factor
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They’re all utilities bundled in macOS.
I look forward to your putting alternative cases.