I guess I'll see if I can find some software to read Mac drives.
I have used MacDrive (see the link that JohnC_21
posted) in the past and it did the job.
The other longer term type "solution" is to use a different drive format if that drive needs to be shared between both Windows computers and Macs. Most external drives come formatted as FAT32, which will work with both Macs and Windows computers (and Linux computers)...but many external drives sold for use with Macs might come formatted as HFS+. Biggest issue with FAT32 is that it does not support files over 4 GB in size. Many times that is not an issue. The other option is exFAT, I believe. I believe moderns versions of Windows (Vista SP1 or later) and macOS (10.6.6 or later) support it. And I don't think it has the same file size limitation as FAT32.
Of course, if changing the format, that would require backing up all the content on the drive before doing that and then restoring it after the format change.