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13 min. boot time
Hi people,
I have an iMac PRO 64GB ram, 1TB SSD and some peripherals. I also have around 500 Apps (aka programs) installed. I do run daily clones and Time Machine.
My iMac used to boot up in about 60 seconds, but now takes 13 MINUTES! I just tried to boot my MacBook Air via USB using the iMac’s clone and it took about 30 minutes. This makes sense as USB is slower than internal SSD, however there is something that puts in a wait of about 12 minutes when the progress bar gets about 2/3 of the way.
I know that you can’t just say “such and such” and fix this, but can anyone give me a clue on how to track down and fix this problem?
Note, I have tried both safe mode and single user modes and it makes no difference to the boot time!
I am also experiencing shutdown problems. Namely 50% of the time I don’t get a shutdown and would have to hold in the Power Button.
Thanks in advance…
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc. -
12 Replies
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My guess would be a corrupt file system. Boot into Recovery mode and use Disk Utility to run First Aid on the boot partition. If you get errors, run it again until there are no errors left.
~jr
http://www.johnrofrano.com
http://www.vasstsoftware.com -
I had already done that. Do you think that something would be logged somewhere? I am thinking that the OS is waiting for something, like mounting a LAN drive or something…
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc. -
Hi Paul,
Have you tried Verbose mode? You may be able to see where the startup / shutdowns are getting stuck for an extended period of time.
https://support.apple.com/HT201573
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Yes I have, but couldn’t make head or tail of it! 🙂
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc. -
I can take a look at it if you’d like, just send a recording to FinalCutProHelp@me.com
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Thanks for the kind offer, however I took a different approach:
1) Clone to 1TB SSD
2) Format internal SSD drive
3) Install OS X and restore from external cloned SSDResult: Boot time 17.9 seconds! Shutdown also very fast.
Don’t understand the reason behind this, but there you are.
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc. -
That’s awesome news! Thank you for posting the fix.
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ps: Just ran an internal SSD disk speed test.
AJA System Test
Write: 2,972 MBps and read 2,442 MBpsBlackMagic Speed Test
Write: 2,993 MBps Read: 2,485 MBpsAnd to Promise Pegasus R3 on TB3
Write: 1,200 MBps Read: 580 MBpsDon’t know why write is faster than read. Can anyone tell me?
Impressive speed.
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc. -
[Paul Szilard] “Don’t know why write is faster than read. Can anyone tell me?”
That is very odd, usually reads and faster than writes. It could be that writes are being cached and once you push enough data through to fill the cache they will slow down?
~jr
http://www.johnrofrano.com
http://www.vasstsoftware.com -
Yes, that sounds plausible.
paul
-apprentice-
joined 25 Nov 2012
platform OS X iMac 27\” 32GB ram 1TB SSD, LR and FCPX etc.
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