Steam doesn't start

[valeryo22]

The message that appears is:


Date/Time: 2016-01-03 23:58:02.285 +0100
OS Version: Mac OS X 10.6.8 (10K549)
Report Version: 6

Interval Since Last Report: 71919 sec
Crashes Since Last Report: 5
Per-App Crashes Since Last Report: 5
Anonymous UUID: 690781DA-F4A6-456E-948A-A82E6AC44A0B

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0

Dyld Error Message:
Library not loaded: /usr/lib/libc++.1.dylib
Referenced from: /Applications/Steam.app/Contents/MacOS/steam_osx
Reason: image not found

Binary Images:
0x8fe00000 - 0x8fe4163b dyld 132.1 (???) <4CDE4F04-0DD6-224E-ACE5-3C06E169A801> /usr/lib/dyld

Model: MacBookPro1,1, BootROM MBP11.0055.B08, 2 processors, Intel Core Duo, 2 GHz, 2 GB, SMC 1.2f10
Graphics: ATI Radeon X1600, ATY,RadeonX1600, PCIe, 256 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x86), Atheros 5424: 2.1.14.6
Bluetooth: Version 2.4.5f3, 2 service, 12 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9100824AS, 93,16 GB
Parallel ATA Device: MATSHITADVD-R UJ-857
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8501, 0xfd400000 / 2
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0218, 0x1d200000 / 2
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8240, 0x5d200000 / 2
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8205, 0x7d100000 / 2

what can I do? you can help me? thank you