terribly slow to boot from Yosemite iMac

Hello

I bought my iMac with Lion installed and slowly put each time a new version of the os x came out.

It went well until what I upgraded to Yosemite. After this upgrade my system boot performance dropped to downright unacceptable.

I tried forums, tips from the Apple Store, etc. and hoped that with El Capitan, things would eventually get better but no, on the contrary.

When the activity of the system of monitoring during the startup I see that there is an abnormal amount of the activity of the hard drive for about 10 minutes directly after login, rendering virtually unusable system. I am, because as much as 65,000 read operations, which I guess is a lot. After the 10 minutes of paralysis, the system works normally. Performance degrades more what it seems (before it was only 5 minutes), so I really want to find a solution to this problem, and preferably one who understood the system wiping and starting up again.

Any advice is welcome.

Stijn

First of all, make sure that you have a full backup and update your storage to the external storage device, as one of the causes of this behavior is a failing drive.

Download Etrecheck and run the tool, and then post the results here.

If there are repetitive blocks of visible errors in Console.app - Applications > utilities > Console.app - after a series of each block that is repeated here.   Please do not post more than a hundred lines or so altogether, please don't post duplicate blocks of the same errors and check anything post you here for sensitive or confidential information.  (There will be lots of cryptic and disturbing aspect messages found normally in the newspapers, and lots of it is quite expected and typical.)  It's the repetitive blocks that are usually of interest with problems such as you're a statement here).

Tags: Mac OS & System Software

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