Jérémie Dumas

When I read the documentation of Accelerate for the error messages you reported, I see e.g. that [vBool32](https://developer.apple.com/documentation/accelerate/vbool32) requires macOS 10.9+, or that [SparseFactorization_t](https://developer.apple.com/documentation/accelerate/sparsefactorization_t) requires macOS 10.13+. That seems more...

Do you have a MWE project with CMake + .cpp using the `Eigen::AccelerateLLT` and `Eigen::AccelerateLDLT` solvers that works on macOS 10.5? The only thing we're doing in Polysolve is really...

I think a simple `main.cpp` that uses both `Eigen::AccelerateLLT` and `Eigen::AccelerateLDLT` to solve a random system would be enough to see if it compiles correctly or not.