updated macos-13 to macos-15-intel, as per actions/runner-images#13046

Author: vineetbansal

.github/workflows/build_default.yml

@@ -46,8 +46,8 @@ jobs:
             cibw_archs: "auto"
           - os: windows-2022
             cibw_archs: "auto64"
-          # Include macos-13 to get Intel x86_64 macs and maos-latest to get the Aaarch64 macs
-          - os: macos-13
+          # Include macos-15-intel to get Intel x86_64 macs and macos-latest to get the Aaarch64 macs
+          - os: macos-15-intel
             cibw_archs: "x86_64"
           - os: macos-latest
             cibw_archs: "arm64"

.github/workflows/build_mkl.yml

@@ -17,9 +17,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-latest now uses arm64 runners, but MKL is x86_64 only, so restrict to the macos-13 runners
+        # macos-latest now uses arm64 runners, but MKL is x86_64 only, so restrict to the macos-15-intel runners
         # to get x86_64 architecture.
-        os: [ubuntu-latest, macos-13]
+        os: [ubuntu-latest, macos-15-intel]
 
     steps:
     - uses: actions/checkout@master