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Thanks for all your feedback guys, I really appreciate it. I think I'm going to just run memtest then do the more extensive hardware test and cancel my genius bar apt. if everything checks out fine.
 
Re: The five second to chime--yeah, that's unusual. Years ago there were some utilities that would allow you to skip the memory POST. I'm not aware of any now, but that doesn't mean they're not out there.
 
My cMP with 48GB RAM (3 sticks, single CPU) takes about 18 seconds before the chime.
 
My single CPU 4,1 with 4x8G non ECC RAM, 14.5s from pressing the button to the start up chime.

3 attemps, consistent result.
 
Could you check the system preference and see whether this startup drive is indeed the SSD? If not, the MP might need to search for a boot drive (tries to locate the old one first), hence the delay you experience.

Magnus

I think my delay was after the chime rather than before it but this Solved it for me...Thank you!!!
 
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Here is what happens with 4GB sticks:

1 stick = 5 chime
2 stick = 10 second chime
3 stick= 12 second chime
4 stick= 14 second chime
5 stick = 18 second chime

8 sticks = 25 second chime

So is there something really wrong or is this normal?
I have not timed mine, but I have 48GB of RAM and a full PCiE cage. It definitely sits there for a bit. Adding Ram made a big difference. But I do not boot that often.

All my USB devices do not help. They really slow things down, too.
 
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Have you found a fix to this yet? I'm having the same problem.

Hello everyone,

I have two iMacs (late 2013) 27" with 32gb RAM, and 3TB Fusion drive. Both are running on latest Sierra 10.12.5. They both perform great, fast, and reliable since I bought them in December 2013. I've been very good at updating them whenever there is available update. Only about 2 weeks ago, I noticed that one of them, when I press the power button on the back, the screen would light up (black) and would get stuck there for about 15 seconds before the fan would start up and the startup chime would play, and the Apple logo would come up, then it would take about another 15 seconds (which is normal) to reach the desktop screen. At first, I thought that was strange that there's a delay in hearing the chime when it used to be almost instantaneously after pressing the power button. What's baffles me is that the other iMac with same specs and OSX installed is not having this issue.

What I did so far which made no difference:
1. Select Startup disk and restart
2. SMC reset
3. PRAM reset
4. Swapped RAMs with the other iMac
5. Safe mode
6. Diagnostic Tools reported no issues found
7. Check potency of the internal battery (turned off wifi, unplugged iMac for 3 days, plugged it back, turned on) it kept date/time which means the battery is in good shape.

This is very frustrating! Any suggestions would be very much appreciated. Please HELP. Thanks!
[doublepost=1500069455][/doublepost]Hello everyone,

I have two iMacs (late 2013) 27" with 32gb RAM, and 3TB Fusion drive. Both are running on latest Sierra 10.12.5. They both perform great, fast, and reliable since I bought them in December 2013. I've been very good at updating them whenever there is available update. Only about 2 weeks ago, I noticed that one of them, when I press the power button on the back, the screen would light up (black) and would get stuck there for about 15 seconds before the fan would start up and the startup chime would play, and the Apple logo would come up, then it would take about another 15 seconds (which is normal) to reach the desktop screen. At first, I thought that was strange that there's a delay in hearing the chime when it used to be almost instantaneously after pressing the power button. What's baffles me is that the other iMac with same specs and OSX installed is not having this issue.

What I did so far which made no difference:
1. Select Startup disk and restart
2. SMC reset
3. PRAM reset
4. Swapped RAMs with the other iMac
5. Safe mode
6. Diagnostic Tools reported no issues found
7. Check potency of the internal battery (turned off wifi, unplugged iMac for 3 days, plugged it back, turned on) it kept date/time which means the battery is in good shape.

This is very frustrating! Any suggestions would be very much appreciated. Please HELP. Thanks!
 
That chime is actually telling you something, all your hardware checked out OK. Takes longer with more stuff.

I have 96 GB of RAM, three SSDs, one 6 TB HDD, and half of an old meatloaf or something in my 5,1 and it takes it 8 years to boot.
 
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Although I wouldn't have responded to this old revived thread, since several have already done so, I'll add my two bits:

When I first got my 2012 that came with 64GB, I noticed it took longer to hear the chime after pressing the power button when compared to my 2008 with 10GB. Further research I discovered that the Mac Pro does a hardware check before determining what chime/boot screen to play and display, including a thorough RAM check. Thus, the more RAM installed, the longer it takes to get to the "all okay" start chime if all hardware passed.
 
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