The macOS Rosetta 2 installation helper app is no longer necessary and has been removed.
EditorBreakingmacOS
6000.3.18f1
LTS · Released Jun 17, 2026 · Changeset 5ebeb53e4c07 · 1 release notes
51build scorehigher = better
050100
Upgrade risk+21Net cleanup+15Live debt+15
cohort: LTS (312)
How this number is computed
Composite = sum of sub_score × weight across six metrics. Sub-scores are percentile-rank(log1p(min(raw, p95))) within the LTS cohort (312 releases). Sub-scores for lower-is-better metrics are flipped to 100 − percentile.
| Sub-score | Formula | Raw | Clip | %ile | Weight | Score | Contrib |
|---|---|---|---|---|---|---|---|
| Breaking surface | (breaking_change + api_change) / total_notes | 0.011 | 0.011 | 68 | 25% | 32 | 7.9 |
| Blocker rate | blockers / total_notes | 0.065 | 0.065 | 72 | 15% | 28 | 4.2 |
| Mobile risk | mobile_known_issues / total_notes | 0 | 0 | 15 | 10% | 85 | 8.5 |
| Fix density | fixes / total_notes | 0.667 | 0.667 | 65 | 15% | 65 | 9.8 |
| Net-fix delta | ((fixes − known_issues) − prior.(fixes − known_issues)) / total_notes | -0.097 | -0.097 | 36 | 15% | 36 | 5.3 |
| Known-issue debt | known_issues / total_notes | 0.086 | 0.086 | 25 | 20% | 75 | 15.1 |
| Composite | 51 | ||||||
* = raw value was clipped at the cohort 95th percentile to prevent outliers from compressing everyone else's scores. Sub-scores marked "med" substitute the cohort median where the input was missing (e.g. first patch on a minor line has no prior patch for net-fix delta).