[softmaxe]

Summary

 Troubleshooting
-  `unsupported macOS version` | ferry supports macOS 26 only.
+  `unsupported macOS version` | ferry could not find SkyLight's private window move interface,
+                                usually because a macOS update changed it. ferry supports macOS 26 only.
 Build
-  `make test` checks ... deployment target, and linked frameworks.
+  `make test` checks ... deployment target, and that it links AppKit.

The error comes from missing SkyLight symbols (src/ferry.m), not a version check; tests/binary.sh only checks for AppKit. Same changes in README.zh-CN.md.

Evidence

• Before: README ties the error to the OS version.
  After: fail(1, "...not found; unsupported macOS version") is only reached when NSClassFromString/symbol lookup returns nil.

Merge Danger

Door: two-way

Blast Radius: docs