My macbook pro mid-2010 won’t connect to a RB951G when WPA or WPA2 is set.
If the wlan has no password set it connects without problem.
I’ve set preamble mode to long as the Wireless FAQ suggest.
I also own an iPad and an iPhone, both of them can connect without problem using WPA/WPA2.
My wireless settings
name="wlan1" mtu=1500 mac-address=4C:5E:0C:5E:B2:9B arp=enabled disable-running-check=no interface-type=Atheros AR9300 radio-name="4C5E0C5EB29B" mode=ap-bridge
ssid="MikroTik-5EB29B" area="" frequency-mode=manual-txpower country=argentina antenna-gain=0 frequency=2417 band=2ghz-b/g/n channel-width=20/40mhz-Ce
scan-list=default wireless-protocol=802.11 rate-set=default supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps
supported-rates-a/g=6Mbps,9Mbps,12Mbps,18Mbps,24Mbps,36Mbps,48Mbps,54Mbps basic-rates-b=1Mbps basic-rates-a/g=6Mbps max-station-count=2007 distance=indoors
tx-power-mode=default noise-floor-threshold=default nv2-noise-floor-offset=default dfs-mode=none vlan-mode=no-tag vlan-id=1 wds-mode=disabled wds-default-bridge=none
wds-default-cost=100 wds-cost-range=50-150 wds-ignore-ssid=no update-stats-interval=disabled bridge-mode=disabled default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0 proprietary-extensions=post-2.9.25 wmm-support=enabled hide-ssid=no security-profile=default disconnect-timeout=3s
on-fail-retry-time=100ms preamble-mode=both compression=no allow-sharedkey=no station-bridge-clone-mac=00:00:00:00:00:00 ampdu-priorities=0 guard-interval=any
ht-supported-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7,mcs-8,mcs-9,mcs-10,mcs-11,mcs-12,mcs-13,mcs-14,mcs-15,mcs-16,mcs-17,mcs-18,mcs-19,mcs-20,mcs-21,mcs-22,
mcs-23
ht-basic-mcs=mcs-0,mcs-1,mcs-2,mcs-3,mcs-4,mcs-5,mcs-6,mcs-7 tx-chains=0,1 rx-chains=0,1 amsdu-limit=8192 amsdu-threshold=8192 tdma-period-size=2 nv2-queue-count=2
nv2-qos=default nv2-cell-radius=30 nv2-security=disabled nv2-preshared-key="" hw-retries=7 frame-lifetime=0 adaptive-noise-immunity=none
hw-fragmentation-threshold=disabled hw-protection-mode=none hw-protection-threshold=0 frequency-offset=0 rate-selection=advanced multicast-helper=default
multicast-buffering=enabled keepalive-frames=enabled
log message
19:42:35 wireless,debug wlan1: 60:33:4B:14:EC:06 attempts to associate
19:42:35 wireless,debug wlan1: 60:33:4B:14:EC:06 not in local ACL, by default accept
19:42:35 wireless,info 60:33:4B:14:EC:06@wlan1: connected
19:42:40 wireless,info 60:33:4B:14:EC:06@wlan1: disconnected, unicast key exchange timeout
19:42:45 wireless,debug wlan1: 60:33:4B:14:EC:06 attempts to associate
19:42:45 wireless,debug wlan1: 60:33:4B:14:EC:06 not in local ACL, by default accept
19:42:45 wireless,info 60:33:4B:14:EC:06@wlan1: connected
19:42:50 wireless,info 60:33:4B:14:EC:06@wlan1: disconnected, unicast key exchange timeout