* installing *source* package ‘scalednap’ ...
** this is package ‘scalednap’ version ‘1.0.0’
** package ‘scalednap’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using C++20
using SDK: ‘MacOSX11.3.1.sdk’
clang++ -arch arm64 -std=gnu++20 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall -g -O2   -c rwrapper.cpp -o rwrapper.o
In file included from rwrapper.cpp:22:
./my_exception.h:3:10: fatal error: 'format' file not found
#include <format>
         ^~~~~~~~
1 error generated.
make: *** [rwrapper.o] Error 1
ERROR: compilation failed for package ‘scalednap’
* removing ‘/Volumes/Builds/packages/big-sur-arm64/results/4.5/scalednap.Rcheck/scalednap’