Come smettere di server xampp mysql?

Ho appena installato xampp sul mio Mac OS x. Quando ho provato ad avviare mysql visualizza un messaggio che mysql is already running on this computer. In order to start mysql stop first mysql . Ho provato a seguire modi per fermarlo, ma nessuno dei due funziona.

mysqladmin version
sudo /usr/local/mysql/mysql.server stop //mysql.server command not found
mysqladmin -u root -p password shutdown //restarts the server but not shutdown

quando uso il comando which mysql mostra questo percorso

/usr/local/bin/mysql

e quando invio il comando ps aux | grep mysqld ottengo l'output seguente

zafarsaleem    85209   0.0  0.3  2699804  13204   ??  S     7:51AM   0:00.88        /Applications/MAMP/Library/bin/mysqld --basedir=/Applications/MAMP/Library --datadir=/Applications/MAMP/db/mysql --plugin-dir=/Applications/MAMP/Library/lib/plugin --lower-case-table-names=0 --log-error=/Applications/MAMP/logs/mysql_error_log.err --pid-file=/Applications/MAMP/tmp/mysql/mysql.pid --socket=/Applications/MAMP/tmp/mysql/mysql.sock --port=8889
zafarsaleem    85093   0.0  0.0  2435488    924   ??  S     7:51AM   0:00.03 /bin/sh /Applications/MAMP/Library/bin/mysqld_safe --port=8889 --socket=/Applications/MAMP/tmp/mysql/mysql.sock --lower_case_table_names=0 --pid-file=/Applications/MAMP/tmp/mysql/mysql.pid --log-error=/Applications/MAMP/logs/mysql_error_log
zafarsaleem    86693   0.0  0.0  2425480    180 s004  R+    8:30AM   0:00.00 grep mysqld
zafarsaleem    86507   0.0  0.3  2678756  11364   ??  S     8:07AM   0:00.63 /usr/local/Cellar/mysql/5.5.20/bin/mysqld --basedir=/usr/local/Cellar/mysql/5.5.20 --datadir=/usr/local/var/mysql --plugin-dir=/usr/local/Cellar/mysql/5.5.20/lib/plugin --max-allowed-packet=32M --log-error=/usr/local/var/mysql/Zafars-MacBook-Pro-2.local.err --pid-file=/usr/local/var/mysql/Zafars-MacBook-Pro-2.local.pid
zafarsaleem    86447   0.0  0.0  2435488    920   ??  S     8:07AM   0:00.02 /bin/sh /usr/local/bin/mysqld_safe --max_allowed_packet=32M

Come posso risolvere questo problema?

Aggiorna

Quando rilascio questo comando launchctl list , allora vedo mysqld nell'elenco come segue

com.apple.AddressBook.SourceSync
-           0      com.apple.AddressBook.abd
1201    -   homebrew.mxcl.mysql                    <--
443         -   homebrew.mxcl.mongodb
-           0   com.google.keystone.user.agent
-           0   com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109
-           0   com.adobe.AAM.Scheduler-1.0
45          -   0x7fd1bba073e0.anonymous.loginwindow
-           1   com.apple.launchctl.Aqua
1261    -    0x7fd1bba0c6e0.anonymous.mysqld        <--
 212    -   0x7fd1ba5206d0.anonymous.launchd
 230    -   0x7fd1ba5203d0.anonymous.Terminal

In secondo luogo quando ho tentato di emettere il comando di sotto come menzionato da @PunjCoder

sudo launchctl unload -w /Library/LaunchDaemons/org.macports.mysql.plist
OUTPUT for above is:
launchctl: Couldn't stat("/Library/LaunchDaemons/org.macports.mysql.plist"): No    such file or directory
nothing found to unload

sudo launchctl unload -w /System/Library/LaunchDaemons/org.macports.mysql.plist
OUTPUT for above is:
launchctl: Couldn't stat("/System/Library/LaunchDaemons/org.macports.mysql.plist"): No such file or directory
nothing found to unload

Quindi cosa posso fare per fermarli e come? Sono molto nuovo a mac os x quindi non so davvero come risolvere questo problema. Per favore aiuto ...