HFS+ is the files system used on many Apple Macintosh computers by Mac OS. You can mount this filesystem in Ubuntu with read only access by default. If you need read/write access then you have to disable journaling with OS X before you can continue.
Can Linux read HFS+?
While Linux can read HFS+, it can’t write to it in journalled mode (which is the norm on macOS for good reason) because there is no support for this within the kernel.
Can Linux read Mac drives?
The answer is – yes, in most cases, and it is actually quite easy to get your Mac-formatted stuff mounted on your Linux system with read-only, and in most cases read-and-write, support.