diff --git a/init/Android.mk b/init/Android.mk
index ac31ef1..895f50f 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -78,6 +78,7 @@
 LOCAL_POST_INSTALL_CMD := mkdir -p \
     $(TARGET_RAMDISK_OUT)/debug_ramdisk \
     $(TARGET_RAMDISK_OUT)/dev \
+    $(TARGET_RAMDISK_OUT)/first_stage_ramdisk \
     $(TARGET_RAMDISK_OUT)/mnt \
     $(TARGET_RAMDISK_OUT)/proc \
     $(TARGET_RAMDISK_OUT)/second_stage_resources \
diff --git a/init/capabilities.cpp b/init/capabilities.cpp
index 0b9f161..ab6ff03 100644
--- a/init/capabilities.cpp
+++ b/init/capabilities.cpp
@@ -69,11 +69,12 @@
 #if defined(__BIONIC__)
         CAP_MAP_ENTRY(PERFMON),
         CAP_MAP_ENTRY(BPF),
+        CAP_MAP_ENTRY(CHECKPOINT_RESTORE),
 #endif
 };
 
 #if defined(__BIONIC__)
-static_assert(CAP_LAST_CAP == CAP_BPF, "CAP_LAST_CAP is not CAP_BPF");
+static_assert(CAP_LAST_CAP == CAP_CHECKPOINT_RESTORE, "CAP_LAST_CAP is not CAP_CHECKPOINT_RESTORE");
 #else
 static_assert(CAP_LAST_CAP == CAP_AUDIT_READ, "CAP_LAST_CAP is not CAP_AUDIT_READ");
 #endif
diff --git a/libutils/RefBase.cpp b/libutils/RefBase.cpp
index 2523097..8e45226 100644
--- a/libutils/RefBase.cpp
+++ b/libutils/RefBase.cpp
@@ -55,7 +55,7 @@
 // case.
 #define DEBUG_REFBASE_DESTRUCTION 1
 
-#if !defined(_WIN32)
+#if !defined(_WIN32) && !defined(__APPLE__)
 // CallStack is only supported on linux type platforms.
 #define CALLSTACK_ENABLED 1
 #else
diff --git a/shell_and_utilities/README.md b/shell_and_utilities/README.md
index 4510dc7..d169d29 100644
--- a/shell_and_utilities/README.md
+++ b/shell_and_utilities/README.md
@@ -182,7 +182,7 @@
 which whoami xargs xxd yes zcat
 
 
-## Android Q
+## Android 10 ("Q")
 
 BSD: grep fsck\_msdos newfs\_msdos
 
@@ -212,7 +212,7 @@
 unshare uptime usleep uudecode uuencode uuidgen vconfig vmstat watch
 wc which whoami xargs xxd yes zcat
 
-## Android R
+## Android 11 ("R")
 
 BSD: fsck\_msdos newfs\_msdos