diff --git a/.claude/skills/quartz-integration/SKILL.md b/.claude/skills/quartz-integration/SKILL.md
index 3a1002d806..555ed0e812 100644
--- a/.claude/skills/quartz-integration/SKILL.md
+++ b/.claude/skills/quartz-integration/SKILL.md
@@ -7,7 +7,7 @@ description: Integration guide for using the Quartz Nostr KMP library in externa
 
 Reference for integrating `com.vitorpamplona.quartz:quartz` into external Nostr KMP projects.
 
-**Published artifact**: `com.vitorpamplona.quartz:quartz:1.12.3` (Maven Central)
+**Published artifact**: `com.vitorpamplona.quartz:quartz:1.12.4` (Maven Central)
 **Targets**: JVM 21+, Android (minSdk 21+), iOS (XCFramework `quartz-kmpKit`)
 **License**: MIT
 
@@ -19,7 +19,7 @@ Reference for integrating `com.vitorpamplona.quartz:quartz` into external Nostr
 
 ```toml
 [versions]
-quartz = "1.12.3"
+quartz = "1.12.4"
 
 [libraries]
 quartz = { module = "com.vitorpamplona.quartz:quartz", version.ref = "quartz" }
@@ -41,7 +41,7 @@ kotlin {
 
 ```kotlin
 dependencies {
-    implementation("com.vitorpamplona.quartz:quartz:1.12.3")
+    implementation("com.vitorpamplona.quartz:quartz:1.12.4")
 }
 ```
 
diff --git a/.claude/skills/quartz-integration/references/gradle-setup.md b/.claude/skills/quartz-integration/references/gradle-setup.md
index 83662e5e6a..cc9f9f5a1f 100644
--- a/.claude/skills/quartz-integration/references/gradle-setup.md
+++ b/.claude/skills/quartz-integration/references/gradle-setup.md
@@ -3,7 +3,7 @@
 ## Current version
 
 ```
-com.vitorpamplona.quartz:quartz:1.12.3
+com.vitorpamplona.quartz:quartz:1.12.4
 ```
 
 Check latest: https://central.sonatype.com/artifact/com.vitorpamplona.quartz/quartz
@@ -16,7 +16,7 @@ Check latest: https://central.sonatype.com/artifact/com.vitorpamplona.quartz/qua
 
 ```toml
 [versions]
-quartz = "1.12.3"
+quartz = "1.12.4"
 
 [libraries]
 quartz = { module = "com.vitorpamplona.quartz:quartz", version.ref = "quartz" }
@@ -55,7 +55,7 @@ kotlin {
 ```kotlin
 // build.gradle.kts (app module)
 dependencies {
-    implementation("com.vitorpamplona.quartz:quartz:1.12.3")
+    implementation("com.vitorpamplona.quartz:quartz:1.12.4")
 }
 ```
 
@@ -70,7 +70,7 @@ plugins {
 }
 
 dependencies {
-    implementation("com.vitorpamplona.quartz:quartz:1.12.3")
+    implementation("com.vitorpamplona.quartz:quartz:1.12.4")
     // JNA needed for libsodium (NIP-44) on JVM
     implementation("net.java.dev.jna:jna:5.18.1")
 }
diff --git a/README.md b/README.md
index 24326c5842..a94adfa9dc 100644
--- a/README.md
+++ b/README.md
@@ -297,16 +297,16 @@ repositories {
 Add the following line to your `commonMain` dependencies:
 
 ```gradle
-implementation('com.vitorpamplona.quartz:quartz:1.12.3')
+implementation('com.vitorpamplona.quartz:quartz:1.12.4')
 ```
 
 Variations to each platform are also available:
 
 ```gradle
-implementation('com.vitorpamplona.quartz:quartz-android:1.12.3')
-implementation('com.vitorpamplona.quartz:quartz-jvm:1.12.3')
-implementation('com.vitorpamplona.quartz:quartz-iosarm64:1.12.3')
-implementation('com.vitorpamplona.quartz:quartz-iossimulatorarm64:1.12.3')
+implementation('com.vitorpamplona.quartz:quartz-android:1.12.4')
+implementation('com.vitorpamplona.quartz:quartz-jvm:1.12.4')
+implementation('com.vitorpamplona.quartz:quartz-iosarm64:1.12.4')
+implementation('com.vitorpamplona.quartz:quartz-iossimulatorarm64:1.12.4')
 ```
 
 Check versions on [MavenCentral](https://central.sonatype.com/search?q=com.vitorpamplona.quartz)
diff --git a/docs/changelog/README.md b/docs/changelog/README.md
index d4b237e5f6..ffdce6cfad 100644
--- a/docs/changelog/README.md
+++ b/docs/changelog/README.md
@@ -2,6 +2,7 @@
 
 Release notes for Amethyst, one file per version. Files are named with zero-padded version numbers so they sort correctly in any file browser. Use [`TEMPLATE.md`](TEMPLATE.md) as the starting point for the next release.
 
+- [v1.12.4 — macOS Desktop Signing Fix](v1.12.04.md)
 - [v1.12.3 — Relay Latency Health & a macOS Notarization Fix](v1.12.03.md)
 - [v1.12.2 — Road Events, Collapsable replies and some fixes](v1.12.02.md)
 - [v1.12.1 — Health Connect Workouts, Share as Image](v1.12.01.md)
diff --git a/docs/changelog/v1.12.04.md b/docs/changelog/v1.12.04.md
new file mode 100644
index 0000000000..b865886287
--- /dev/null
+++ b/docs/changelog/v1.12.04.md
@@ -0,0 +1,22 @@
+# v1.12.4: macOS Desktop Signing Fix
+
+Highlights:
+
+- Fixes Developer ID code signing for the macOS desktop DMG, which had failed in
+  CI with "Could not find certificate ... in keychain []".
+
+## Build & Documentation
+
+- Fixes the macOS desktop DMG release build: Compose's signer maps the signing
+  identity to a certificate via `security find-certificate`, which did not
+  resolve the CI-imported certificate through the keychain search list (bare
+  `codesign` did). The release workflow now exports the throwaway keychain path
+  and points Compose's `signing.keychain` straight at it.
+
+## Contributors
+
+- @npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z
+
+## Translations
+
+- _None this release._
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 306a584524..c30a474f3b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,8 +2,8 @@
 # Amethyst app version — single source of truth consumed by both Android (amethyst/)
 # and Desktop (desktopApp/). `appCode` is the Android versionCode: a monotonic
 # integer that must increment on every release, even when `app` is unchanged.
-app = "1.12.3"
-appCode = "451"
+app = "1.12.4"
+appCode = "452"
 accompanistAdaptive = "0.37.3"
 cachemapVersion = "0.2.4"
 composeMultiplatform = "1.11.1"