diff --git a/package.json b/package.json
index c633ab2..eb6a6c2 100644
--- a/package.json
+++ b/package.json
@@ -4,9 +4,9 @@
   "description": "Blast software package for Platforma Backend",
   "scripts": {
     "build": "true",
-    "pkg:build": "rm -rf dld && ./scripts/build.sh 2.10.0 && ./scripts/build.sh 2.11.0 && ./scripts/build.sh 2.12.0 && ./scripts/build.sh 2.13.0 && ./scripts/build.sh 2.14.0 && ./scripts/build.sh 2.14.1 && ./scripts/build.sh 2.15.0 && ./scripts/build.sh 2.16.0",
+    "pkg:build": "rm -rf dld && ./scripts/build.sh 2.10.0 && ./scripts/build.sh 2.11.0 && ./scripts/build.sh 2.12.0 && ./scripts/build.sh 2.13.0 && ./scripts/build.sh 2.14.0 && ./scripts/build.sh 2.14.1 && ./scripts/build.sh 2.15.0",
 
-    "publish:packages": "./scripts/publish.sh 2.10.0 && ./scripts/publish.sh 2.11.0 && ./scripts/publish.sh 2.12.0 && ./scripts/publish.sh 2.13.0 && ./scripts/publish.sh 2.14.0 && ./scripts/publish.sh 2.14.1 && ./scripts/publish.sh 2.15.0 && ./scripts/publish.sh 2.16.0",
+    "publish:packages": "./scripts/publish.sh 2.10.0 && ./scripts/publish.sh 2.11.0 && ./scripts/publish.sh 2.12.0 && ./scripts/publish.sh 2.13.0 && ./scripts/publish.sh 2.14.0 && ./scripts/publish.sh 2.14.1 && ./scripts/publish.sh 2.15.0",
     "publish:descriptors": "pl-pkg publish descriptors",
     "release": "npm run pkg:build && npm run publish:packages && npm run publish:descriptors"
   },
diff --git a/scripts/2.x/pkg-download.sh b/scripts/2.x/pkg-download.sh
index 894a926..1b5d226 100755
--- a/scripts/2.x/pkg-download.sh
+++ b/scripts/2.x/pkg-download.sh
@@ -50,11 +50,17 @@ function download() {
     local _suffix=""
 
     local _os="${os}"
+    local _arch="${arch}"
+
     if [ "${os}" == "windows" ]; then
         _os="win64"
     fi
+    if [ "${os}" == "macosx" ]; then
+        # for older versions of blast, download x64 instead of aarch64 (no aarch64 was built before 2.16.0)
+        _arch="x64"
+    fi
 
-    local _url="${base_url}/${version}/ncbi-blast-${version}+-${arch}-${_os}.${_ext}"
+    local _url="${base_url}/${version}/ncbi-blast-${version}+-${_arch}-${_os}.${_ext}"
 
     local _show_progress=("--show-progress")
     if [ "${CI:-}" = "true" ]; then