docs: mark QDLDL as the macOS AUTO default

Companion to bodono/scs-python#210, which switches the macOS branch of
_resolve_auto to prefer the bundled QDLDL over Apple Accelerate.
Accelerate remains available via LinearSolver.ACCELERATE.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: bodono

docs/src/api/python.rst

@@ -49,7 +49,7 @@ SCS uses. It accepts a :code:`scs.LinearSolver` enum value.
 The default is :code:`AUTO`, which selects the best available solver for
 the platform:
 
-- **macOS**: Apple Accelerate if available, otherwise QDLDL
+- **macOS**: QDLDL (Apple Accelerate is available via :code:`LinearSolver.ACCELERATE`)
 - **Linux / Windows**: MKL Pardiso if available, otherwise QDLDL
 
 .. list-table::

docs/src/install/python.rst

@@ -39,8 +39,9 @@ Apple Accelerate (macOS)
 On macOS the Apple Accelerate backend is built and included automatically —
 no extra install flags are needed. It uses the Accelerate framework's sparse
 LDL\ :sup:`T` solver, which is optimized for Apple hardware including Apple
-Silicon. When using the default :code:`linear_solver=scs.LinearSolver.AUTO`,
-Accelerate is selected automatically on macOS.
+Silicon. The default :code:`linear_solver=scs.LinearSolver.AUTO` selects the
+bundled QDLDL on macOS; opt in to Accelerate explicitly with
+:code:`linear_solver=scs.LinearSolver.ACCELERATE`.
 
 MKL
 """

docs/src/linear_solver/index.rst

@@ -110,9 +110,9 @@ To build with CMake::
     cmake -DUSE_APPLE_ACCELERATE=ON ..
 
 In Python, the Accelerate backend is included automatically on macOS
-(``pip install scs`` is sufficient). It is the default when using
-``linear_solver=scs.LinearSolver.AUTO`` on macOS. It can also be selected
-explicitly::
+(``pip install scs`` is sufficient). On macOS,
+``linear_solver=scs.LinearSolver.AUTO`` selects the bundled QDLDL; select
+Accelerate explicitly with::
 
     solver = scs.SCS(data, cone, linear_solver=scs.LinearSolver.ACCELERATE)