__m256i SIMD registers vs. compiling issue

I’m trying to use __m256i SIMD registers/instructions and the compiler started complaining:
“Aligned deallocation function of type … is only available on macOS 10.14 or newer”. (my OS is 10.15)

This appears after I add member variable of type __m256i into one of the classes. A quick check into the forums reveals that the error goes away with “-fno-aligned-allocation” compiler flag. But doesn’t this mean that then the __m256i will be aligned wrong and will cause runtime issues when reading/writing with SIMD instructions?

I guess changing the “macOS Deployment Target” to “10.14” would also solve the issue.