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!