OSX Terminal command to move all files in directory
You're getting "too many argument" because there are probably too many files in ~/Desktop/dir/ that that are allowed by glob matching pattern on command line.
To move all files from ~/Desktop/dir/ to ~/Desktop/dir/dir2 use this find instead:
find ~/Desktop/dir/ -type f -execdir mv '{}' ~/Desktop/dir/dir2 \;Or to move everything including files and directories use:
cd ~/Desktop/dir/find . -path './dir2' -prune -o ! -name . -exec mv '{}' ./dir2 \;i.e. other than dir2 and . move everything to ~/Desktop/dir/dir2
*.* matches all filenames that have a dot in the second or further position. It will not match filenames that do not have a dot. Using * instead will match all filenames that do not start with a dot.