macOS Catalina

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<div style="font: bold 2em/1.2 -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--wiki-color);">macOS Catalina</div>
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! class="ios-lab" | Developer
| class="ios-val" | [[Apple]]
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! class="ios-lab" | Version
| class="ios-val" | 10.15
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! class="ios-lab" | Initial release
| class="ios-val" | October 7, 2019
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! class="ios-lab" | Final release
| class="ios-val" | 10.15.7 (September 2020)
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! class="ios-lab" | Price
| class="ios-val" | Free
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! class="ios-lab" | Preceded by
| class="ios-val" | [[macOS Mojave]]
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! class="ios-lab" | Succeeded by
| class="ios-val" | [[macOS Big Sur]]
|}

{{macOS Version Navbox}}

macOS Catalina (version 10.15) is the sixteenth release of [[macOS]], shipped on October 7, 2019 — the platform's rip-the-bandage year. iTunes, eighteen years old and carrying Apple's whole media history, split into Music, Podcasts, and TV; 32-bit applications stopped launching entirely; and the system moved onto its own read-only volume. Sidecar turned an iPad into a Mac display, Catalyst opened iOS app porting to all developers, and Screen Time crossed from iOS.

The breakage — dead 32-bit apps and games, aggressive new permission prompts, notarization requirements — made Catalina the era's most complained-about upgrade, and "wait for the point releases" its lasting advice.

= Features =

Music/Podcasts/TV replacing iTunes; the read-only system volume; Sidecar; Mac Catalyst; Screen Time; Find My (merged); Voice Control accessibility; Apple Arcade; and activation lock on T2 Macs.

= Legacy =

Catalina cleared the ground the Apple-silicon era was about to build on — pure 64-bit, sealed system, notarized software — absorbing the anger so [[macOS Big Sur|Big Sur]] could arrive clean. The iTunes split ended the defining software of the iPod age; the 32-bit cutoff remains the line that divides Mac software history.
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