I bought a 27" iMac for Christmas a few years ago and I haven't had a single issue until today and now I am beyond frustrated 
I have a 27" iMac with 3tb fusion drive. This morning I saw a system update for yosemite beta 3 and decided to install it. Upon my return I saw a grey screen with a circle and a line through it as if something had gone wrong. No buttons worked so I restarted the computer. OS X came up like normal I logged in and the machine began to hang. The mouse worked fine but nothing else worked. Ok another reset. Same issue.
So I went into recovery mode, tried verify disk and it failed and told me to repair the disk so I did and it have an error told me to backup my files and restore. No biggie I'll just restore from my time machine backup. The first time I tried to restore I selected the date and time to before my update. I got to the select destination screen and sat there for 15 minute and nothing came up. So I went back and started all over this time it gave an error saying "the time machine backup is in use" or setting like that so another restart selected the backup I wanted to load clicked next and got a spinning beach ball for 10 minutes.
Ok so at this point I figure well I'll just do a fresh install then migrate stuff over. Went to go to restart and enter recovery mode the computer stopped at a grey screen and started beeping a single beep every few seconds (from inside not the speakers). Uh oh. Ok try again. Same issue. So now I try to let it start normally. When starting normally I see the apple logo, the progress bar fills half way and the computer shuts down on its own. If I try to go to recovery mode I get the beeping sound. To clarify the beeping is a single beep every second.
I've tried SMC reset and the NVRAM and PRAM. Nothing works. Is my Mac dead? Has my fusion drive gone to the great beyond or is there something else I can try?
I have a 27" iMac with 3tb fusion drive. This morning I saw a system update for yosemite beta 3 and decided to install it. Upon my return I saw a grey screen with a circle and a line through it as if something had gone wrong. No buttons worked so I restarted the computer. OS X came up like normal I logged in and the machine began to hang. The mouse worked fine but nothing else worked. Ok another reset. Same issue.
So I went into recovery mode, tried verify disk and it failed and told me to repair the disk so I did and it have an error told me to backup my files and restore. No biggie I'll just restore from my time machine backup. The first time I tried to restore I selected the date and time to before my update. I got to the select destination screen and sat there for 15 minute and nothing came up. So I went back and started all over this time it gave an error saying "the time machine backup is in use" or setting like that so another restart selected the backup I wanted to load clicked next and got a spinning beach ball for 10 minutes.
Ok so at this point I figure well I'll just do a fresh install then migrate stuff over. Went to go to restart and enter recovery mode the computer stopped at a grey screen and started beeping a single beep every few seconds (from inside not the speakers). Uh oh. Ok try again. Same issue. So now I try to let it start normally. When starting normally I see the apple logo, the progress bar fills half way and the computer shuts down on its own. If I try to go to recovery mode I get the beeping sound. To clarify the beeping is a single beep every second.
I've tried SMC reset and the NVRAM and PRAM. Nothing works. Is my Mac dead? Has my fusion drive gone to the great beyond or is there something else I can try?
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