Installed Yosemite yesterday and had 4 hard crashes so far. What's going on?

I have a 27" iMac(late 2012) 16gb memory and 3.2 ghz i5 processor. I upgraded from Mavericks to Yosemite yesterday and my computer has crashed 4 times since then. Black screen, apple message, then restart. What's wrong with the new OS?

Johnny, i run OS X 10.10 on a 5 year old iMac. No bugs worth mentioning. We also have a MBA 2013. No bugs. The problems people encounter are mostly caused bij third-party apps or unsupported hardware. I've seen many upgrades of OS X coming by. And it's always the same story. people install the new OS X as soon as possible, not wondering if their hard- and software is up to it, in may cases not even bother to make a decent backup, just in case something goes wrong.
ANd then they find themselves in trouble after install. They conclude: the new OS wasn't ready for launch. The facts: These users weren't ready for launch.
i Suggest we focus here on helping the TS in finding the cause of his crashes. The fact you have (different) problems too is not helping rprietz in any way.

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    Crashed Module Offset: 0x00012192
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    Thank you for the response Linc- here are the first four dozen lines-
    12/8/14 13:07:54.000 kernel[0]: memorystatus_thread: idle exiting pid 2205 [accountsd]
    12/8/14 13:07:55.000 kernel[0]: memorystatus_thread: idle exiting pid 2236 [com.apple.Accoun]
    12/8/14 13:07:56.000 kernel[0]: memorystatus_thread: idle exiting pid 2243 [com.apple.Addres]
    12/8/14 13:07:57.000 kernel[0]: memorystatus_thread: idle exiting pid 2267 [CloudKeychainPro]
    12/8/14 13:07:58.000 kernel[0]: memorystatus_thread: idle exiting pid 2212 [CalNCService]
    12/8/14 13:07:59.000 kernel[0]: memorystatus_thread: idle exiting pid 2204 [CalendarAgent]
    12/8/14 13:08:01.000 kernel[0]: memorystatus_thread: idle exiting pid 2269 [diagnosticd]
    12/8/14 13:08:02.306 UserEventAgent[234]: com.apple.TMHelperAgent.SetupOffer enabled
    12/8/14 13:08:02.000 kernel[0]: memorystatus_thread: idle exiting pid 2271 [com.apple.CloudP]
    12/8/14 13:08:02.769 com.apple.iCloudHelper[2237]: service connection interrupted
    12/8/14 13:08:02.769 com.apple.iCloudHelper[2237]: service connection interrupted
    12/8/14 13:08:03.000 kernel[0]: memorystatus_thread: idle exiting pid 2268 [com.apple.sbd]
    12/8/14 13:08:04.578 UserEventAgent[234]: com.apple.TMHelperAgent.SetupOffer enabled
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (1 total, 1 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)
    12/8/14 13:08:04.000 kernel[0]: BUG in process suhelperd[177]: over-released legacy external boost assertions (0 total, 0 external, 0 legacy-external)

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