build: Bump minimum supported macOS to 13.0

Running Bitcoin Core on unsupported OSes may expose users to security
issues.

macOS Monterey 12 received its final security update (12.7.6) on July
2024. Apple classifies the hardware that can run macOS 12 at most as
"obsolete worldwide".

contrib/devtools/symbol-check.py

@@ -235,7 +235,7 @@ def check_MACHO_libraries(binary) -> bool:
     return ok
 
 def check_MACHO_min_os(binary) -> bool:
-    if binary.build_version.minos == [11,0,0]:
+    if binary.build_version.minos == [13,0,0]:
         return True
     return False
 

contrib/devtools/test-symbol-check.py

@@ -116,7 +116,7 @@ class TestSymbolChecks(unittest.TestCase):
                 }
         ''')
 
-        self.assertEqual(call_symbol_check(cxx, source, executable, ['-Wl,-platform_version','-Wl,macos', '-Wl,11.0', '-Wl,11.4']),
+        self.assertEqual(call_symbol_check(cxx, source, executable, ['-Wl,-platform_version','-Wl,macos', '-Wl,13.0', '-Wl,11.4']),
                 (1, f'{executable}: failed SDK'))
 
     def test_PE(self):

depends/hosts/darwin.mk

@@ -1,4 +1,4 @@
-OSX_MIN_VERSION=11.0
+OSX_MIN_VERSION=13.0
 OSX_SDK_VERSION=14.0
 XCODE_VERSION=15.0
 XCODE_BUILD_ID=15A240d

doc/build-osx.md

@@ -51,8 +51,6 @@ To install, run the following from your terminal:
 brew install cmake boost pkg-config libevent
 ```
 
-For macOS 11 (Big Sur) and 12 (Monterey) you need to install a more recent version of llvm.
-
 ``` bash
 brew install llvm
 ```

doc/release-notes-empty-template.md

@@ -43,7 +43,7 @@ Compatibility
 ==============
 
 Bitcoin Core is supported and extensively tested on operating systems
-using the Linux Kernel 3.17+, macOS 11.0+, and Windows 7 and newer. Bitcoin
+using the Linux Kernel 3.17+, macOS 13.0+, and Windows 7 and newer. Bitcoin
 Core should also work on most other Unix-like systems but is not as
 frequently tested on them. It is not recommended to use Bitcoin Core on
 unsupported systems.

share/qt/Info.plist.in

@@ -3,7 +3,7 @@
 <plist version="0.9">
 <dict>
   <key>LSMinimumSystemVersion</key>
-  <string>11</string>
+  <string>13</string>
 
   <key>LSArchitecturePriority</key>
   <array>