diff --git a/.cirrus.yml b/.cirrus.yml
index ab1178dd1a..1e073d707e 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -67,13 +67,13 @@ task:
     - if [ -z "$NOHACK" ]; then cargo hack check --each-feature --target i686-unknown-freebsd; fi
   before_cache_script: rm -rf $CARGO_HOME/registry/index
 
-# Test macOS x86_64 in a full VM
+# Test macOS aarch64 in a full VM
 task:
-  name: macOS x86_64
+  name: macOS aarch64
   env:
-    TARGET: x86_64-apple-darwin
-  osx_instance:
-    image: big-sur-xcode
+    TARGET: aarch64-apple-darwin
+  macos_instance:
+    image: ghcr.io/cirruslabs/macos-ventura-base:latest
   setup_script:
     - curl --proto '=https' --tlsv1.2 -sSf -o rustup.sh https://sh.rustup.rs
     - sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
@@ -235,9 +235,9 @@ task:
     - name: Linux x32
       env:
         TARGET: x86_64-unknown-linux-gnux32
-    - name: macOS aarch64
+    - name: macOS x86_64
       env:
-        TARGET: aarch64-apple-darwin
+        TARGET: x86_64-apple-darwin
     - name: NetBSD x86_64
       env:
         TARGET: x86_64-unknown-netbsd
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a332bc5f09..dd14ec7005 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,15 +3,16 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## [Unreleased] - ReleaseDate
+### Fixed
+- Fix `SockaddrIn6` bug that was swapping flowinfo and scope_id byte ordering.
+  ([#1964](https://github.com/nix-rust/nix/pull/1964))
+
 ## [0.26.1] - 2022-11-29
-### Added
-### Changed
 ### Fixed
 - Fix UB with `sys::socket::sockopt::SockType` using `SOCK_PACKET`.
   ([#1821](https://github.com/nix-rust/nix/pull/1821))
 
-### Removed
-
 ## [0.26.0] - 2022-11-29
 ### Added
 
diff --git a/README.md b/README.md
index 7597ba0afc..2c42b905f7 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ limitations. Support for platforms is split into three tiers:
 The following targets are supported by `nix`:
 
 Tier 1:
+  * aarch64-apple-darwin
   * aarch64-unknown-linux-gnu
   * arm-unknown-linux-gnueabi
   * armv7-unknown-linux-gnueabihf
@@ -58,13 +59,11 @@ Tier 1:
   * mips64el-unknown-linux-gnuabi64
   * mipsel-unknown-linux-gnu
   * powerpc64le-unknown-linux-gnu
-  * x86_64-apple-darwin
   * x86_64-unknown-freebsd
   * x86_64-unknown-linux-gnu
   * x86_64-unknown-linux-musl
 
 Tier 2:
-  * aarch64-apple-darwin
   * aarch64-apple-ios
   * aarch64-linux-android
   * arm-linux-androideabi
@@ -75,6 +74,7 @@ Tier 2:
   * s390x-unknown-linux-gnu
   * x86_64-apple-ios
   * x86_64-linux-android
+  * x86_64-apple-darwin
   * x86_64-unknown-illumos
   * x86_64-unknown-netbsd
 
diff --git a/src/sys/socket/addr.rs b/src/sys/socket/addr.rs
index 8b23b10cf0..4e565a5b68 100644
--- a/src/sys/socket/addr.rs
+++ b/src/sys/socket/addr.rs
@@ -1476,8 +1476,8 @@ impl From<SockaddrIn6> for net::SocketAddrV6 {
         net::SocketAddrV6::new(
             net::Ipv6Addr::from(addr.0.sin6_addr.s6_addr),
             u16::from_be(addr.0.sin6_port),
-            u32::from_be(addr.0.sin6_flowinfo),
-            u32::from_be(addr.0.sin6_scope_id),
+            addr.0.sin6_flowinfo,
+            addr.0.sin6_scope_id,
         )
     }
 }
@@ -3167,6 +3167,18 @@ mod tests {
                 SockaddrIn6::size() as usize
             );
         }
+
+        #[test]
+        // Ensure that we can convert to-and-from std::net variants without change.
+        fn to_and_from() {
+            let s = "[1234:5678:90ab:cdef::1111:2222]:8080";
+            let mut nix_sin6 = SockaddrIn6::from_str(s).unwrap();
+            nix_sin6.0.sin6_flowinfo = 0x12345678;
+            nix_sin6.0.sin6_scope_id = 0x9abcdef0;
+
+            let std_sin6 : std::net::SocketAddrV6 = nix_sin6.into();
+            assert_eq!(nix_sin6, std_sin6.into());
+        }
     }
 
     mod sockaddr_storage {
diff --git a/src/sys/socket/mod.rs b/src/sys/socket/mod.rs
index 2d7159a63a..8513b6fbe7 100644
--- a/src/sys/socket/mod.rs
+++ b/src/sys/socket/mod.rs
@@ -1298,7 +1298,7 @@ impl<'a> ControlMessage<'a> {
             }
             #[cfg(any(target_os = "android", target_os = "linux"))]
             ControlMessage::AlgSetIv(iv) => {
-                mem::size_of_val(&iv) + iv.len()
+                mem::size_of::<&[u8]>() + iv.len()
             },
             #[cfg(any(target_os = "android", target_os = "linux"))]
             ControlMessage::AlgSetOp(op) => {