The most efficient and best solution suggested by experts is to use the ToolsGround OLM to MBOX converter to convert Mac OLM files to the MBOX file format with 100% accuracy without data loss. It also provides batch conversion features so that users can convert multiple OLM files into MBOX formats simultaneously, thus saving considerable time and effort. It also requires minimal steps to convert OLM to MBOX. So, using this software, such conversion becomes easy and is user-friendly for both technical and non-technical users. Moreover, it is also compatible with all versions of Windows operating system.