Mac Pro 1.1 Reboot issue (Yosemite)

Discussion in 'Mac Pro' started by lukapop, Dec 17, 2015.

  1. lukapop macrumors newbie

    Dec 17, 2015
    hi guys, i'm having an issue with my mac pro 1.1 running last verison of yosemite with pike and yosefix script.

    Mac spec: 2.66 ghz 32gb ram ati 5770 (apple) hd1 raptor 320gb hd2 1tb

    Everything is working well except when it come the time for a reboot, in that case after the sistem shut down the mac is stuck on a black screen in a loop ( is continuosly trying to reboot, you can hear the noise of the superdrive when it start)

    The only solution is pushing the power button to force a shutdown

    Then it start correctly afterward.
    I dont have isse if i shut down from the system. Any suggestion?
  2. JedNZ macrumors 6502


    Dec 6, 2015
    Deep South
    I've got a Mac Pro 1,1 upgraded to 2,1 firmware, running 10.11.2 using the "place the modified file in 2 locations" method, and I recently had a similar issue (boots to a black screen). To get around this I reset the SMC and Parameter Ram.

    Not sure if doing the following is safe seeing you have the Pike and Yosefix script, but if others can confirm it's safe then try the following:
    Reset the SMC: turn Mac Pro off, unplug power from wall - wait 15 seconds, plug power back in (but don't turn it on yet) - wait another 5 seconds, then power it on (start it up).
    Reset Parameter Ram: restart and immediately hold down Cmd+Opt+P+R - keep holding down while you hear the startup chime "bong" sound - release keys after the third restart "bong" sound.
  3. lukapop thread starter macrumors newbie

    Dec 17, 2015
    Hi, thanks for your suggestion, i'll try it tomorrow!

    Any other advice are welcome!!
  4. lukapop thread starter macrumors newbie

    Dec 17, 2015
    i have tried to reset the pram but the mac get stuck after the first bong. On all king of reboot attempt it get stuck.

    Any clue?

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