ci: run all macOS jobs on paid managed runners (retire self-hosted minis)

.github/workflows/build-ghosttykit.yml

@@ -9,7 +9,7 @@ concurrency:
 
 jobs:
   build-ghosttykit:
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 20
     env:
       GHOSTTYKIT_CRASH_REPORT_SUBDIR: cmux/crash

.github/workflows/ci-macos-compat.yml

@@ -9,12 +9,12 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+          - os: warp-macos-15-arm64-6x
             timeout: 30
             startup_smoke: true
             virtual_display: true
             skip_zig: false
-          - os: ${{ vars.MACOS_RUNNER_26 || 'warp-macos-26-arm64-6x' }}
+          - os: warp-macos-26-arm64-6x
             timeout: 30
             startup_smoke: true
             virtual_display: false

.github/workflows/ci.yml

@@ -253,14 +253,10 @@ jobs:
         run: bun run test:db:behavior
 
   tests:
-    # TEMPORARY (2026-06-18): pinned to hosted runners. The self-hosted austin
-    # mac-minis in the MACOS_RUNNER_15 pool cannot broker the XCTest control
-    # session with testmanagerd ("Timed out 120s initiating control session
-    # with daemon" -> Executed 0 tests -> idle-timeout), so this required check
-    # can never go green there. Revert to
-    # `${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}` once the austin
-    # runners are repaired (GUI login session + automation mode + unwedged
-    # testmanagerd). Tracked by the CI-flakiness handoff.
+    # macOS CI runs on paid managed runners only. The self-hosted Mac minis
+    # were retired (2026-06-18): with no logged-in GUI session, testmanagerd
+    # could not broker the XCTest control session and tests never ran there.
+    # All macOS jobs now use warp / depot / hosted runners.
     runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 75
     env:
@@ -667,7 +663,7 @@ jobs:
     # Keep lag validation separate from UI regressions so functional UI failures
     # and performance regressions stay isolated. Broader interactive UI suites
     # still run via test-e2e.yml on GitHub-hosted runners.
-    runs-on: ${{ vars.MACOS_RUNNER_DISPLAY || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     # A cold DerivedData cache (any project.pbxproj or Package.resolved change
     # mints a new cache key with no restore-keys fallback) forces a full
     # cmux build whose Swift codegen alone can run 20+ min. Project/package
@@ -677,7 +673,7 @@ jobs:
     steps:
       - name: Validate display runner identity
         env:
-          REQUESTED_RUNNER: ${{ vars.MACOS_RUNNER_DISPLAY || 'warp-macos-15-arm64-6x' }}
+          REQUESTED_RUNNER: warp-macos-15-arm64-6x
           RUNNER_CONTEXT_NAME: ${{ runner.name }}
         run: |
           set -euo pipefail
@@ -992,7 +988,7 @@ jobs:
           rm -f "${VDISPLAY_HELPER_PATH:-}" "${VDISPLAY_READY:-}" "${VDISPLAY_ID_PATH:-}" "${VDISPLAY_LOG:-}"
 
   release-ghostty-cli-helper:
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 20
     steps:
       - name: Clear stale git locks (self-hosted reused workspace)
@@ -1057,7 +1053,7 @@ jobs:
     # Release builds need enough disk for a universal Release build plus the
     # restored SwiftPM cache. Default to a clean paid macOS 26 runner instead
     # of the generic persistent macOS 26 pool.
-    runs-on: ${{ vars.MACOS_RUNNER_26_RELEASE || 'warp-macos-26-arm64-6x' }}
+    runs-on: warp-macos-26-arm64-6x
     timeout-minutes: 45
     steps:
       - name: Clear stale git locks (self-hosted reused workspace)
@@ -1190,14 +1186,14 @@ jobs:
           [[ "$SDK_VERSION" == 26.* ]]
 
   ui-regressions:
-    runs-on: ${{ vars.MACOS_RUNNER_DISPLAY || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     # Cold builds after project/package changes can spend more than 25 minutes
     # in build-for-testing before the UI regression script starts.
     timeout-minutes: 45
     steps:
       - name: Validate display runner identity
         env:
-          REQUESTED_RUNNER: ${{ vars.MACOS_RUNNER_DISPLAY || 'warp-macos-15-arm64-6x' }}
+          REQUESTED_RUNNER: warp-macos-15-arm64-6x
           RUNNER_CONTEXT_NAME: ${{ runner.name }}
         run: |
           set -euo pipefail

.github/workflows/ios-testflight.yml

@@ -104,7 +104,7 @@ jobs:
     # blocks publishing arbitrary code by dispatching the workflow against a
     # feature branch (the ASC secrets are only meant to ship reviewed main).
     if: needs.decide.outputs.should_build == 'true' && github.ref == 'refs/heads/main'
-    runs-on: ${{ vars.MACOS_RUNNER_IOS || 'macos-26' }}
+    runs-on: macos-26
     timeout-minutes: 60
     env:
       ASC_API_KEY_ID: ${{ secrets.ASC_API_KEY_ID }}

.github/workflows/nightly.yml

@@ -108,7 +108,7 @@ jobs:
     # injected before signing, preferring a pre-26 SDK when the runner image has
     # one but falling back to the selected app Xcode when the image only ships
     # Xcode 26. The helper build remains required and lipo-verified below.
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 30
     steps:
       - name: Clear stale git locks (self-hosted reused workspace)

.github/workflows/perf-activation.yml

@@ -9,7 +9,7 @@ on:
         required: false
         default: ""
       runner:
-        description: macOS runner (PRs use Depot for GUI activation; manual auto follows MACOS_RUNNER_15, then warp)
+        description: macOS runner (PRs use Depot for GUI activation; manual auto uses warp)
         required: false
         default: auto
         type: choice
@@ -45,15 +45,15 @@ concurrency:
 
 jobs:
   activation-session:
-    runs-on: ${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner) }}
+    runs-on: ${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner) }}
     timeout-minutes: 45
     env:
       PERF_TAG: perf-${{ github.run_id }}-${{ github.run_attempt }}
     steps:
       - name: Validate Depot runner identity
-        if: ${{ startsWith(github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner), 'depot-macos-') }}
+        if: ${{ startsWith(github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner), 'depot-macos-') }}
         env:
-          REQUESTED_RUNNER: ${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner) }}
+          REQUESTED_RUNNER: ${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner) }}
           RUNNER_CONTEXT_NAME: ${{ runner.name }}
         run: |
           set -euo pipefail
@@ -131,8 +131,8 @@ jobs:
         uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: .ci-source-packages
-          key: spm-${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner) }}-${{ hashFiles('cmux.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}
-          restore-keys: spm-${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner) }}-
+          key: spm-${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner) }}-${{ hashFiles('cmux.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}
+          restore-keys: spm-${{ github.event_name == 'pull_request' && 'depot-macos-latest' || ((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner) }}-
 
       - name: Sanitize Swift package cache
         run: python3 scripts/ci/sanitize-xcode-source-packages-cache.py .ci-source-packages

.github/workflows/release.yml

@@ -16,7 +16,7 @@ env:
 
 jobs:
   build-ghostty-cli-helper:
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 20
     steps:
       - name: Clear stale git locks (self-hosted reused workspace)
@@ -67,7 +67,7 @@ jobs:
     # macOS 15 above because Zig 0.15.2 cannot link it on macOS 26.
     # Import the Apple Developer ID intermediate chain into the build keychain
     # below so signing does not depend on mutable runner login-keychain state.
-    runs-on: ${{ vars.MACOS_RUNNER_26 || 'warp-macos-26-arm64-6x' }}
+    runs-on: warp-macos-26-arm64-6x
     # Notarization wait times vary on Apple's side; v0.64.14 finished at 19m16s
     # and v0.64.15 attempt 1 was killed by a 20-minute budget mid-notarization.
     timeout-minutes: 40

.github/workflows/reload-build.yml

@@ -32,7 +32,7 @@ on:
       runner:
         description: >-
           macOS runner label to build on. Blacksmith (blacksmith-6vcpu-macos-26),
-          our self-hosted fleet (cmux-macos-26 / cmux-aws-macos-15), warp, or depot.
+          warp, or depot. Paid managed runners only; self-hosted minis retired.
         required: false
         default: blacksmith-6vcpu-macos-26
         type: string

.github/workflows/test-depot.yml

@@ -28,7 +28,7 @@ on:
 
 jobs:
   tests:
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 20
     steps:
       - name: Clear stale git locks (self-hosted reused workspace)

.github/workflows/test-e2e.yml

@@ -1,5 +1,5 @@
 name: E2E test with video recording
-run-name: ${{ inputs.test_filter }} on ${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }} @ ${{ inputs.ref || github.ref_name }}
+run-name: ${{ inputs.test_filter }} on ${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }} @ ${{ inputs.ref || github.ref_name }}
 
 on:
   workflow_dispatch:
@@ -25,7 +25,7 @@ on:
         default: true
         type: boolean
       runner:
-        description: "Runner OS (auto follows the MACOS_RUNNER_15 repo variable, then warp; pick depot-macos-* for GUI activation)"
+        description: "Runner OS (auto uses warp; pick depot-macos-* for GUI activation)"
         required: false
         default: "auto"
         type: choice
@@ -40,20 +40,20 @@ on:
           - depot-macos-14
 
 concurrency:
-  group: e2e-${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }}-${{ inputs.ref || github.ref_name }}-${{ inputs.test_filter }}
+  group: e2e-${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }}-${{ inputs.ref || github.ref_name }}-${{ inputs.test_filter }}
   cancel-in-progress: true
 
 jobs:
   e2e:
-    runs-on: ${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }}
+    runs-on: ${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }}
     timeout-minutes: ${{ fromJSON(inputs.job_timeout || '20') }}
     env:
       TEST_REF: ${{ inputs.ref || github.ref }}
     steps:
       - name: Validate Depot runner identity
-        if: ${{ startsWith((!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner, 'depot-macos-') }}
+        if: ${{ startsWith((!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner, 'depot-macos-') }}
         env:
-          REQUESTED_RUNNER: ${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }}
+          REQUESTED_RUNNER: ${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }}
           RUNNER_CONTEXT_NAME: ${{ runner.name }}
         run: |
           set -euo pipefail
@@ -248,8 +248,8 @@ jobs:
         uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: .ci-source-packages
-          key: spm-${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }}-${{ hashFiles('cmux.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}
-          restore-keys: spm-${{ (!inputs.runner || inputs.runner == 'auto') && (vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x') || inputs.runner }}-
+          key: spm-${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }}-${{ hashFiles('cmux.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved') }}
+          restore-keys: spm-${{ (!inputs.runner || inputs.runner == 'auto') && 'warp-macos-15-arm64-6x' || inputs.runner }}-
 
       - name: Sanitize Swift package cache
         run: python3 scripts/ci/sanitize-xcode-source-packages-cache.py .ci-source-packages

.github/workflows/test-ios.yml

@@ -110,7 +110,7 @@ jobs:
   mobile-core-package:
     needs: detect-ios-changes
     if: ${{ needs.detect-ios-changes.outputs.should_run == 'true' }}
-    runs-on: ${{ vars.MACOS_RUNNER_IOS || 'macos-26' }}
+    runs-on: macos-26
     timeout-minutes: 10
     steps:
       - name: Checkout
@@ -150,7 +150,7 @@ jobs:
   ios-simulator:
     needs: detect-ios-changes
     if: ${{ needs.detect-ios-changes.outputs.should_run == 'true' }}
-    runs-on: ${{ vars.MACOS_RUNNER_IOS || 'macos-26' }}
+    runs-on: macos-26
     timeout-minutes: 35
     strategy:
       fail-fast: false

.github/workflows/tmux-corpus.yml

@@ -61,7 +61,7 @@ jobs:
 
   terminal-nightly:
     if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
-    runs-on: ${{ vars.MACOS_RUNNER_15 || 'warp-macos-15-arm64-6x' }}
+    runs-on: warp-macos-15-arm64-6x
     timeout-minutes: 30
     env:
       # XCTest app-host crashes can leave xcodebuild waiting in Swift's crash