Use macos-15-intel (#1091)

Author: jaimergp

.github/workflows/main.yml

@@ -53,10 +53,10 @@ jobs:
             conda-standalone: conda-standalone-onedir
             check-docs-schema: true
           # MACOS
-          - os: macos-13
+          - os: macos-15-intel
             python-version: "3.9"
             conda-standalone: conda-standalone-nightly
-          - os: macos-13
+          - os: macos-15-intel
             python-version: "3.10"
             conda-standalone: conda-standalone-onedir
           - os: macos-latest
@@ -208,7 +208,7 @@ jobs:
         include:
           - runner: ubuntu-latest
             subdir: linux-64
-          - runner: macos-13
+          - runner: macos-15-intel
             subdir: osx-64
           - runner: macos-latest
             subdir: osx-arm64