Bash test nested incorrectly; leads to syntax error

[bicobus]

Offending line:

screenFetch/screenfetch-dev

Line 3025 in e2ca5ae

if [ "$distro" == "Mac OS X" || "$distro" == "macOS" ]; then

[ is an alias for test, as such it doesn't support logical OR operations. The line should be rewritten to use [[ instead.