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imac nvram
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2011 iMac 27": NVRAM problem? Only works correct if started with CMD+OPT+P+R
My late 2011 iMac 27" has developed a strange thing: it works very slow, booting takes 5 minutes and the screens acts strange, building windows up very slow. There is no sound, the volume does not work. After trying some things I tried to reset the NVRAM with COMMAND+OPTION+P+R and that...