| Field | Xcode 9.0 Beta 4 | Xcode 9.0.1 | Diff |
|---|---|---|---|
| Release type | Beta 4 | stable | different |
| Edition | - | - | same |
| Release date | 2017-07-24 | 2017-10-15 | different |
| Minimum macOS | 10.12.4 | 10.12.6 | different |
| Swift | unknown | 4.0 | different |
| iOS SDK | unknown | unknown | same |
| Build | 9M189t | 9A1004 | different |
建议：如果你是生产环境主力开发，优先选择 stable 版本；如需验证新 SDK，再考虑 beta。