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Release notes: https://developer.apple.com/documentation/xcode-release-notes/xcode-26_3-release-notes https://developer.apple.com/documentation/xcode-release-no

• r2vcap 8mo ago
  From my years of iOS development—and based on https://xcodereleases.com https://xcodereleases.com typically ships two major Xcode updates each year: - X.0 (September): bumps Swift, SDK versions, etc. It also tends to have a noticeably longer beta cycle than other releases. - X.3 or X.4 (around March): bumps Swift again and raises the minimum required macOS version. Other releases in between are usually smaller updates that add features or fix bugs, but they don’t involve major toolchain-level or fundamental changes. Today’s release doesn’t bump the Swift version, which suggests the core toolchain is essentially the same as Xcode 26.2—so it makes sense that the minimum macOS version wasn’t raised either.
• w10-1 8mo ago
  > this version does not require MacOS 26 I think it is required for any AI support. Xcode will run with limited features on earlier OS's.
  • f0rmatfunction 8mo ago
    Agreed - I tried installing Xcode26.3 on my mac running Sequoia and there's no "intelligence" pane in Xcode settings to connect Claude like there is in the docs.
• zombot 8mo ago
  But Sequoia is already a noticeably worse bugfest than Sonoma, so I'm loath to update.
• debo_ 8mo ago
  Maybe the xcode developers hate Tahoe as much as HN seems to.