in Source/RiderSourceCodeAccess/Private/RiderPathLocator/Mac/RiderPathLocatorMac.cpp [110:120]
FString FRiderPathLocator::GetDefaultIDEInstallLocationForToolboxV2()
{
#if ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION <= 20
TCHAR CHomePath[4096];
FPlatformMisc::GetEnvironmentVariable(TEXT("HOME"), CHomePath, ARRAY_COUNT(CHomePath));
const FString FHomePath = CHomePath;
#else
const FString FHomePath = FPlatformMisc::GetEnvironmentVariable(TEXT("HOME"));
#endif
return FPaths::Combine(FHomePath, TEXT("Applications"));
}