diff --git a/CHANGELOG.md b/CHANGELOG.md
index 629ab052..ad8d9a9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,10 @@
 
 ### Added
 
+- **openkal-macos 0.21.1。** 睡眠不再占用处理器时间：内核读取 `ulock_wait` 所等待的字时不处理缺页，对尚未驻留的页返回
+  `EFAULT`；`kal_time_sleep` 等待的是一个从未写过的零字，每次等待立即失败，睡眠成了整段时长的自旋（在 arm64 与 x86_64 运行机上
+  睡 200 ms 耗费 127 至 200 ms 处理器时间）。等待现在在 `EFAULT` 时读取该字后重试，睡眠所用的字位于当前上下文的栈上。测试成员
+  `openkal` 随之移动。GLOBAL 为 GitHub 标签归档，CN 为 GitCode `mcpp-res` 镜像，sha256 两处一致。
 - **openkal-ld/run/tools/bind 0.4.0。** 在 openkal 0.23 的实现上构建（openkal-linux 0.24.0、openkal-macos 0.21.0、openkal-windows
   0.19.0）：映像在每次开机选定的基址上放置，数据作为预备副本保存在用户缓存中；触页记录（`okprof record --what touch`、
   `okld touch`）按程序的资源偏好预读；初始化代码的快照每次开机生成一次、之后的启动直接映射（`OKRUN_SNAPSHOT=0` 关闭）；启动的
diff --git a/pkgs/o/openkal-macos.lua b/pkgs/o/openkal-macos.lua
index 4940462c..2cdff842 100644
--- a/pkgs/o/openkal-macos.lua
+++ b/pkgs/o/openkal-macos.lua
@@ -19,6 +19,13 @@ package = {
 
     xpm = {
         linux = {
+            ["0.21.1"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.1.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-macos/releases/download/0.21.1/openkal-macos-0.21.1.tar.gz",
+                },
+                sha256 = "044e1550dcda8eebb23bac4d2f4bacb1a030eb9a7ffa28613dd4677e6f0c1043",
+            },
             ["0.21.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.0.tar.gz",
@@ -224,6 +231,13 @@ package = {
             },
         },
         macosx = {
+            ["0.21.1"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.1.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-macos/releases/download/0.21.1/openkal-macos-0.21.1.tar.gz",
+                },
+                sha256 = "044e1550dcda8eebb23bac4d2f4bacb1a030eb9a7ffa28613dd4677e6f0c1043",
+            },
             ["0.21.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.0.tar.gz",
@@ -429,6 +443,13 @@ package = {
             },
         },
         windows = {
+            ["0.21.1"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.1.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-macos/releases/download/0.21.1/openkal-macos-0.21.1.tar.gz",
+                },
+                sha256 = "044e1550dcda8eebb23bac4d2f4bacb1a030eb9a7ffa28613dd4677e6f0c1043",
+            },
             ["0.21.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-macos/archive/refs/tags/0.21.0.tar.gz",
diff --git a/tests/examples/openkal/mcpp.toml b/tests/examples/openkal/mcpp.toml
index 15498541..4329b334 100644
--- a/tests/examples/openkal/mcpp.toml
+++ b/tests/examples/openkal/mcpp.toml
@@ -24,7 +24,7 @@ openkal = "0.23.0"
 openkal-linux = "0.24.0"
 
 [target.'cfg(os = "macos")'.dependencies.mcpplibs]
-openkal-macos = "0.21.0"
+openkal-macos = "0.21.1"
 
 [target.'cfg(windows)'.dependencies.mcpplibs]
 openkal-windows = "0.19.0"