I would like to try MySQL 5.6 on my machine, but I cannot start it. I always get an error :
[ERROR] /usr/local/mysql-5.6.5-m8-osx10.6-x86/bin/mysqld: ambiguous option '--log=/var/log/mysqld.log' (log-bin, log_slave_updates)
my.cnf
[mysqld] pid-file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/mysql.pid log-error=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-error.log log-slow-queries=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-slowquery.log log-bin=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-bin.log general_log_file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-general_log_file.log log=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql.log I tried to set the log and log-bin parameters in my.cnf and also as start parameters for mysqld, but with no luck. Any idea what I can do? 
My environment
OS X 10.6.8 mysql-5.6.5-m8-osx10.6-x86 (not _x64 version) Note: I'm also running MySQL 5.5 on this machine (different port and socket). I also try to stop this instance but I get the some error.
Update: Thank you for help but I'm still gettings the some error. I have now changed my.cnf to:
[mysqld] user = myusername port = 3307 socket = /tmp/mysql_56.sock skip-external-locking key_buffer_size = 256M group_concat_max_len = 50240 max_allowed_packet = 16777216 table_open_cache = 256 sort_buffer_size = 1M read_buffer_size = 1M read_rnd_buffer_size = 4M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size= 16M thread_concurrency = 8 datadir=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data pid-file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/mysql.pid log-error=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-error.log log-slow-queries=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-slowquery.log log-bin=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-bin.log general-log=1 general_log_file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-general_log_file.log And I start MySQL with a script:
cd /usr/local/mysql-5.6.5-m8-osx10.6-x86 ./bin/mysqld_safe --basedir=/usr/local/mysql-5.6.5-m8-osx10.6-x86 cd $HOME But I'm still getting the same error:
120611 16:02:02 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql-5.6.5-m8-osx10.6-x86/data
120611 16:02:02 [ERROR] /usr/local/mysql-5.6.5-m8-osx10.6-x86/bin/mysqld: ambiguous option '--log=/var/log/mysqld.log' (log-bin, log_slave_updates)
120611 16:02:02 [ERROR] Aborting
120611 16:02:02 [Note] Binlog end
120611 16:02:02 mysqld_safe mysqld from pid file /usr/local/mysql-5.6.5-m8-osx10.6-x86/mysql.pid ended
This is very strange because I did not set --log=/var/log/mysqld.log anywhere.

