Add public Golden Gate Xcode 27 images (#379)

.github/workflows/monthly.yml

@@ -58,6 +58,8 @@ jobs:
       max-parallel: 1
       matrix:
         include:
+          - macos_version: golden-gate
+            disable_sip_template: disable-sip-with-username.pkr.hcl
           - macos_version: sonoma
             disable_sip_template: disable-sip.pkr.hcl
           - macos_version: sequoia
@@ -162,6 +164,10 @@ jobs:
             xcode_version: "15.4"
             xcode_components: ""
             latest: false
+          - macos_version: golden-gate
+            xcode_version: "27"
+            xcode_components: '"MetalToolchain"'
+            latest: true
     env:
       MACOS_VERSION: ${{ matrix.macos_version }}
       XCODE_COMPONENTS: ${{ matrix.xcode_components }}

.github/workflows/release.yml

@@ -37,7 +37,7 @@ jobs:
         # Xcode 27 requires macOS Tahoe 26.6 or later.
         macos_version: >-
           ${{ startsWith(github.event.release.tag_name || inputs.xcode_version, '27')
-              && fromJSON('["tahoe"]')
+              && fromJSON('["tahoe", "golden-gate"]')
               || fromJSON('["tahoe", "sequoia"]') }}
     env:
       MACOS_VERSION: ${{ matrix.macos_version }}
@@ -100,6 +100,12 @@ jobs:
       max-parallel: 1
       matrix:
         include:
+          - macos_version: golden-gate
+            xcode_versions: '"27"'
+            additional_ios_builds: ""
+            additional_tvos_builds: ""
+            xcode_components: '"MetalToolchain"'
+            disk_size: 240
           - macos_version: sequoia
             xcode_versions: '"26.0.1",16.4,16.3,16.2,16.1,16'
             additional_ios_builds: "18.5,18.4,18.2,17.5"

.github/workflows/template-validation.yml

@@ -79,6 +79,12 @@ jobs:
             validate "$template"
           done
 
+          validate templates/xcode.pkr.hcl \
+            -var macos_version=golden-gate \
+            -var 'xcode_version=["27"]' \
+            -var 'xcode_components=["MetalToolchain"]' \
+            -var expected_runtimes_file=data/expected.golden-gate.runtimes.txt
+
           validate templates/base.pkr.hcl \
             -var vm_name=template-validation-base
 
@@ -269,6 +275,12 @@ jobs:
             additional_tvos_builds: "17.5"
             xcode_components: '"MetalToolchain"'
             disk_size: 380
+          - macos_version: golden-gate
+            xcode_versions: '"27"'
+            additional_ios_builds: ""
+            additional_tvos_builds: ""
+            xcode_components: '"MetalToolchain"'
+            disk_size: 240
     env:
       ADDITIONAL_IOS_BUILDS: ${{ matrix.additional_ios_builds }}
       ADDITIONAL_TVOS_BUILDS: ${{ matrix.additional_tvos_builds }}

README.md

@@ -7,8 +7,8 @@ The following image variants are currently available:
 
 * `macos-{golden-gate,tahoe,sequoia,sonoma}-vanilla` — a vanilla macOS installation with helpful tweaks such as auto-login, but no additional software preinstalled
 * `macos-{golden-gate,tahoe,sequoia,sonoma}-base` — based on `macos-{golden-gate,tahoe,sequoia,sonoma}-vanilla` image, it comes with `brew` and [other useful software](https://github.com/cirruslabs/macos-image-templates/blob/main/templates/base.pkr.hcl) pre-installed, but without Xcode
-* `macos-{tahoe,sequoia,sonoma}-xcode:N` — based on `macos-{tahoe,sequoia,sonoma}-base` image and has `Xcode N` with [`Flutter`](https://flutter.dev/) pre-installed
-* `macos-runner:{tahoe,sequoia,sonoma}` — a variant of `xcode:N` with several versions of `Xcode` pre-installed and [`xcodes` tool](https://github.com/XcodesOrg/xcodes) to switch between them.
+* `macos-{golden-gate,tahoe,sequoia,sonoma}-xcode:N` — based on `macos-{golden-gate,tahoe,sequoia,sonoma}-base` image and has `Xcode N` with [`Flutter`](https://flutter.dev/) pre-installed
+* `macos-runner:{golden-gate,tahoe,sequoia,sonoma}` — a variant of `xcode:N` with one or more versions of `Xcode` pre-installed and [`xcodes` tool](https://github.com/XcodesOrg/xcodes) to switch between them.
 
 See a full list of VMs available [here](https://github.com/orgs/cirruslabs/packages?tab=packages&q=macos-).
 
@@ -44,7 +44,7 @@ on the host, guest, and workload.
 ## Release Cadence
 
 Once a new version of Xcode is released, we will initiate a GitHub release which will automatically build and push
-a new version of the `macos-{tahoe,sequoia}-xcode:N`. This generally happens the next weekend after a release.
+a new version of the `macos-{golden-gate,tahoe,sequoia}-xcode:N` images on supported macOS versions. This generally happens the next weekend after a release.
 Please watch this repository releases to get notified about new images.
 
 ## Update Cadence

data/expected.golden-gate.runtimes.txt

@@ -0,0 +1,5 @@
+== Runtimes ==
+iOS 27.0 (27.0 - 24A434) - com.apple.CoreSimulator.SimRuntime.iOS-27-0
+tvOS 27.0 (27.0 - 24J360) - com.apple.CoreSimulator.SimRuntime.tvOS-27-0
+watchOS 27.0 (27.0 - 24R362) - com.apple.CoreSimulator.SimRuntime.watchOS-27-0
+visionOS 27.0 (27.0 - 24M362) - com.apple.CoreSimulator.SimRuntime.xrOS-27-0

templates/vanilla-golden-gate.pkr.hcl

@@ -12,7 +12,7 @@ packer {
 }
 
 source "tart-cli" "tart" {
-  from_ipsw    = "https://updates.cdn-apple.com/2026SummerSeed/7b1c2bd9-7617-426d-92e5-ef204407ffaa/UniversalMac_27.0_26A5416b_Restore.ipsw"
+  from_ipsw    = "https://updates.cdn-apple.com/2026FallFCS/afcfc88e-bbe6-44bf-a5da-07c56eebc06c/UniversalMac_27.0_26A428_Restore.ipsw"
   vm_name      = "golden-gate-vanilla"
   cpu_count    = 4
   memory_gb    = 8