lxsplit

Split large files into smaller parts or rejoin them

brewmacoslinux
Try with needOr install directly
Source

About

Tool for splitting or joining files

Commands

lxsplit

Examples

Split a large file into 10MB chunks$ lxsplit -s 10m largefile.iso
Join previously split file parts back together$ lxsplit -j largefile.iso.001
Split a file into specific number of parts$ lxsplit -n 5 bigfile.zip