diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 37c40cb2..e301510b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,7 +19,7 @@ jobs:
   macos:
     name: Apple Other
     # visionOS requires Xcode 15.2+, which is only available on the arm64 runners.
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@nightly
@@ -32,7 +32,7 @@ jobs:
       - run: cargo test --no-run --target=aarch64-apple-tvos -Zbuild-std --features=std
       - run: cargo test --no-run --target=aarch64-apple-watchos -Zbuild-std --features=std
       # visionOS requires Xcode 15.2+, GitHub Actions defaults to an older version.
-      - run: sudo xcode-select -switch /Applications/Xcode_15.2.app
+      - run: sudo xcode-select -switch /Applications/Xcode_16.app
       # std is broken on visionOS right now
       #- run: cargo test --no-run --target=aarch64-apple-visionos -Zbuild-std --features=std
 
diff --git a/.github/workflows/nopanic.yaml b/.github/workflows/nopanic.yaml
index 54f794d3..59816c99 100644
--- a/.github/workflows/nopanic.yaml
+++ b/.github/workflows/nopanic.yaml
@@ -117,7 +117,7 @@ jobs:
 
   macos:
     name: macOS
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@master
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0125ea00..aa00763c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -27,7 +27,7 @@ jobs:
         # Only Test macOS on stable to reduce macOS CI jobs
         include:
           # aarch64-apple-darwin.
-          - os: macos-14
+          - os: macos-15
             toolchain: stable
     steps:
       - uses: actions/checkout@v7
@@ -96,12 +96,12 @@ jobs:
         run: cargo test
       - name: Test getrandom_backend="extern_impl"
         env:
-          RUSTFLAGS: -Dwarnings --cfg getrandom_backend="extern_impl"
+          RUSTFLAGS: -Dwarnings -Aincomplete_features --cfg getrandom_backend="extern_impl"
         run: cargo test
 
   ios:
     name: iOS Simulator
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@master
@@ -110,7 +110,7 @@ jobs:
           targets: aarch64-apple-ios-sim
       - name: Install precompiled cargo-dinghy
         run: |
-          VERSION=0.8.1
+          VERSION=0.8.6
           URL="https://github.com/sonos/dinghy/releases/download/${VERSION}/cargo-dinghy-macos-${VERSION}.tgz"
           wget -O - $URL | tar -xz --strip-components=1 -C ~/.cargo/bin
       - name: Check cargo-dinghy version.
@@ -129,7 +129,7 @@ jobs:
           echo "device=$SIM_ID" >> $GITHUB_ENV
       - uses: Swatinem/rust-cache@v2
       - name: Run tests
-        run: cargo dinghy -p auto-ios-aarch64-sim -d ${{ env.device }} test
+        run: RUST_BACKTRACE=1 cargo dinghy -p auto-ios-aarch64-sim -d ${{ env.device }} test -- --nocapture
 
   windows:
     name: Windows
diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 328e36b2..e5b39061 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -114,7 +114,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - name: Generate Docs
         env:
-          RUSTDOCFLAGS: -Dwarnings --cfg docsrs --cfg getrandom_backend="extern_impl"
+          RUSTDOCFLAGS: -Dwarnings -Aincomplete_features --cfg docsrs --cfg getrandom_backend="extern_impl"
         run: cargo doc --no-deps --features std,sys_rng
 
   typos:
diff --git a/src/backends/use_file.rs b/src/backends/use_file.rs
index a1d372a0..b5562532 100644
--- a/src/backends/use_file.rs
+++ b/src/backends/use_file.rs
@@ -161,7 +161,7 @@ mod sync {
     /// Wake up all threads which wait for value of atomic `FD` to change.
     pub(super) fn wake() {
         let op = libc::FUTEX_WAKE | libc::FUTEX_PRIVATE_FLAG;
-        let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, libc::INT_MAX) };
+        let ret = unsafe { libc::syscall(libc::SYS_futex, &FD, op, libc::c_int::MAX) };
         debug_assert!(ret >= 0);
     }