diff --git a/.github/workflows/qlat.yml b/.github/workflows/qlat.yml
index d0f07fb7..135f63f1 100644
--- a/.github/workflows/qlat.yml
+++ b/.github/workflows/qlat.yml
@@ -331,7 +331,7 @@ jobs:
     - name: Install Brew packages
       run: |
         # brew update
-        brew install llvm autoconf automake coreutils flock findutils pkg-config
+        brew install llvm autoconf automake coreutils flock findutils pkg-config gnu-sed
         brew install open-mpi ninja patchelf eigen gsl zlib openssl@3 mpfr
         brew install fftw
         # brew upgrade
@@ -385,7 +385,7 @@ jobs:
     - name: Install Brew packages
       run: |
         # brew update
-        brew install llvm autoconf automake coreutils flock findutils pkg-config
+        brew install llvm autoconf automake coreutils flock findutils pkg-config gnu-sed
         brew install open-mpi ninja patchelf eigen gsl zlib openssl@3 mpfr
         brew install fftw
         # brew upgrade
@@ -490,7 +490,7 @@ jobs:
     - name: Install Brew packages
       run: |
         # brew update
-        brew install llvm autoconf automake coreutils flock findutils pkg-config
+        brew install llvm autoconf automake coreutils flock findutils pkg-config gnu-sed
         brew install open-mpi ninja patchelf eigen gsl zlib openssl@3 mpfr
         brew install fftw
         # brew upgrade
diff --git a/qcore/setenv.sh b/qcore/setenv.sh
index c9d8972c..86b767f9 100644
--- a/qcore/setenv.sh
+++ b/qcore/setenv.sh
@@ -12,6 +12,9 @@ if [ "$(uname)" == "Darwin" ]; then
         if [ -e "$(brew --prefix)/opt/coreutils/libexec/gnubin" ]; then
             export PATH="$(brew --prefix)/opt/coreutils/libexec/gnubin":"$PATH"
         fi
+        if [ -e "$(brew --prefix)/opt/gnu-sed/libexec/gnubin" ]; then
+            export PATH="$(brew --prefix)/opt/gnu-sed/libexec/gnubin":"$PATH"
+        fi
         if [ -e "$(brew --prefix)/opt/llvm/bin" ]; then
             export PATH="$(brew --prefix)/opt/llvm/bin":"$PATH"
         fi
diff --git a/scripts/download-core.sh b/scripts/download-core.sh
index f2099555..a270d173 100755
--- a/scripts/download-core.sh
+++ b/scripts/download-core.sh
@@ -91,7 +91,7 @@ fi
 if [ -e Grid-tblum/configure ] ; then
     echo "Grid-tblum bootstrapped."
 else
-    ( cd Grid-tblum ; git clean -f ; sed -i 's/gsha256sum/sha256sum/g' bootstrap.sh ; ./bootstrap.sh || true ; ls -l Eigen || true ; git checkout bootstrap.sh )
+    ( cd Grid-tblum ; git clean -f ; if command -v gsha256sum ; then echo OK ; else sed -i 's/gsha256sum/sha256sum/g' bootstrap.sh || true ; fi ; ./bootstrap.sh || true ; ls -l Eigen || true ; git checkout bootstrap.sh || true )
 fi
 
 if [ -d Hadrons-tblum ] ; then