diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 8236c6cc3..2de6ec6ba 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -141,7 +141,7 @@ jobs:
 
 - job: OSX_OpenMP
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   steps:   
   - script: |
       brew update
@@ -151,7 +151,7 @@ jobs:
      
 - job: OSX_GCC_Nothreads
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   steps:   
   - script: |
       brew update
@@ -167,7 +167,7 @@ jobs:
      
 - job: OSX_OpenMP_Clang
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   variables:
      LD_LIBRARY_PATH: /usr/local/opt/llvm/lib
      LIBRARY_PATH: /usr/local/opt/llvm/lib
@@ -180,7 +180,7 @@ jobs:
 
 - job: OSX_OpenMP_Clang_cmake
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   variables:
      LD_LIBRARY_PATH: /usr/local/opt/llvm/lib
      LIBRARY_PATH: /usr/local/opt/llvm/lib
@@ -196,7 +196,7 @@ jobs:
       
 - job: OSX_dynarch_cmake
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   variables:
      LD_LIBRARY_PATH: /usr/local/opt/llvm/lib
      LIBRARY_PATH: /usr/local/opt/llvm/lib
@@ -210,7 +210,7 @@ jobs:
 
 - job: OSX_Ifort_Clang
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   variables:
      LD_LIBRARY_PATH: /usr/local/opt/llvm/lib
      MACOS_HPCKIT_URL: https://registrationcenter-download.intel.com/akdlm/irc_nas/17643/m_HPCKit_p_2021.2.0.2903_offline.dmg
@@ -243,7 +243,7 @@ jobs:
  
 - job: OSX_NDK_ARMV7
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   steps:   
   - script: | 
       brew update
@@ -263,7 +263,7 @@ jobs:
 
 - job: OSX_IOS_ARMV7
   pool:
-     vmImage: 'macOS-10.15'
+     vmImage: 'macOS-11'
   variables:
      CC: /Applications/Xcode_12.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
      CFLAGS: -O2 -mno-thumb -Wno-macro-redefined -isysroot /Applications/Xcode_12.4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS14.4.sdk -arch armv7 -miphoneos-version-min=5.1