~$ curl -L https://www.chef.io/chef/install.sh | sudo bash -s -- -v 12.4.0
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 18736  100 18736    0     0  60799      0 --:--:-- --:--:-- --:--:-- 60831Password:

Downloading Chef 12.4.0 for mac_os_x...
downloading https://www.getchef.com/chef/metadata?v=12.4.0&prerelease=false&nightlies=false&p=mac_os_x&pv=10.10&m=x86_64
  to file /tmp/install.sh.48781/metadata.txt
trying wget...
trying curl...
url https://opscode-omnibus-packages.s3.amazonaws.com/mac_os_x/10.8/x86_64/chef-12.4.0-1.dmg
md5 421f2f46702186baf04aa309e67010be
sha256  6dfb7faada6458dc79cf5584253bbd01b7bd1d515bf96b5646a398e7a10f4fc1
downloaded metadata file looks valid...
downloading https://opscode-omnibus-packages.s3.amazonaws.com/mac_os_x/10.8/x86_64/chef-12.4.0-1.dmg
  to file /tmp/install.sh.48781/chef-12.4.0-1.dmg
trying wget...
Comparing checksum with shasum...
Installing Chef 12.4.0
installing dmg file...
Checksumming Protective Master Boot Record (MBR : 0)…
Protective Master Boot Record (MBR :: verified   CRC32 $A63E199D
Checksumming GPT Header (Primary GPT Header : 1)…
 GPT Header (Primary GPT Header : 1): verified   CRC32 $FF4AFFE3
Checksumming GPT Partition Data (Primary GPT Table : 2)…
GPT Partition Data (Primary GPT Tabl: verified   CRC32 $FE1C4B6F
Checksumming  (Apple_Free : 3)…
                    (Apple_Free : 3): verified   CRC32 $00000000
Checksumming disk image (Apple_HFS : 4)…
..........................................................................................................................................................................................................
          disk image (Apple_HFS : 4): verified   CRC32 $5AB2BBEF
Checksumming  (Apple_Free : 5)…
                    (Apple_Free : 5): verified   CRC32 $00000000
Checksumming GPT Partition Data (Backup GPT Table : 6)…
GPT Partition Data (Backup GPT Table: verified   CRC32 $FE1C4B6F
Checksumming GPT Header (Backup GPT Header : 7)…
  GPT Header (Backup GPT Header : 7): verified   CRC32 $6087A04D
verified   CRC32 $6756DB0C
/dev/disk4              GUID_partition_scheme
/dev/disk4s1            Apple_HFS                       /Volumes/chef_software
installer: Package name is Chef Client
installer: Installing at base path /
installer: The install was successful.
"disk4" unmounted.
"disk4" ejected.
~$ chef-client -v
Chef: 12.3.0
~$ which chef-client
/opt/chefdk/bin/chef-client
~$ whereis chef-client
/usr/bin/chef-client
~$ /usr/bin/chef-client -v
Chef: 12.4.0
~$ sudo cp /usr/bin/chef-client /opt/chefdk/bin/chef-client
~$ chef-client -v
Chef: 12.3.0
~$ /opt/chefdk/bin/chef-client -v
Chef: 12.3.0
~$ sudo mv /opt/chefdk/bin/chef-client /opt/chefdk/bin/chef-client-old
~$ sudo cp /usr/bin/chef-client /opt/chefdk/bin/
~$ chef-client -v
Chef: 12.3.0
~$ /opt/chefdk/bin/chef-client -v
Chef: 12.3.0
~$ /usr/bin/chef-client -v
Chef: 12.4.0
~$ chef-client -v
Chef: 12.3.0