El Capitan slow to detect bluetooth

My dad has a late 2009 iMac which he recently installed El Capitan, 10.11, on (perhaps the age of the Mac paired with the new iOS is the issue - I am unfamiliar with Macintosh). Upon bootup, the Bluetooth mouse and wireless (which are all that he currently has) take FOREVER to detect. Does anyone know of any settings to alter, or troubleshooting tips to try to speed up the connection? It used to be near instantaneous. Apps are also slow to open, but that is not as annoying as not being able to use the mouse and keyboard without waiting 5-10 minutes after boot.

Any help is greatly appreciated!
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MPCP-MattAsked:
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strungCommented:
Have you updated to OS 10.11.1?

Also try resetting the SMC:  https://support.apple.com/en-ca/HT201295
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strungCommented:
Also check the battery level in the mouse and keyboard and re-pair the mouse and keyboard.

See here for more suggestions: http://osxdaily.com/2013/05/06/fix-bluetooth-device-disconnecting/
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MPCP-MattAuthor Commented:
We havent tried anything as of yet. I will try your suggestions and post the results. Thank you!
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strungCommented:
If you haven't updated to 10.11.1, do that first by pulling down the Apple Menu to App Store and click on Updates.
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MPCP-MattAuthor Commented:
After I posted my last comment, my dad told me that the mouse and keyboard are working ok (doh). However, it is very slow to boot and for the dock to be accessible. Any tips on that? Is it likely that it could be just an older machine causing the issue? I think I ran CCleaner for Mac last time I was here since I know nothing about how to clean up a Mac but maybe there are other steps to take/nothing I can do to truly improve an older Mac with a new OS?
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MPCP-MattAuthor Commented:
And I will still look into updating if possible
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strungCommented:
The first thing to check is to make sure that the hard drive is not close to full. Mac's need to keep 15% of the drive free.

From the symptoms you describe, the most likely cause of the slow boot is disk drive corruption or a failing drive. To diagnose and possibly repair this, do the following:

Reboot the computer while holding down the command-R key combination until the Apple Logo appears. This will boot the computer from the recovery partition and allow you to repair the main partition.

When the computer boots, choose Disk Utility, then the Disk First Aid tab.  Click on the icon of the hard drive at the left. at the bottom right, it should report the S.M.A.R.T. status. This should show "Verified". If it does not, your hard drive is failing and needs to be replaced.

Assuming the S.M.A.R.T. test passes, then choose Repair Disk. Let us know if it reports any repairs. If it did, then that is likely your problem.
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strungCommented:
Apple changed Disk Utility in El Capitan and it is possible that the S.M.A.R.T. test is no longer available. I am not running El Capitan yet, so can't say for certain.
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MPCP-MattAuthor Commented:
Thank you so much. I will check the disk health asap.
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MPCP-MattAuthor Commented:
Ah! Well we shall see after the update if it is still available
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strungCommented:
Even if the S.M.A.R.T. test is not available, you should still run Repair Disk.
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MPCP-MattAuthor Commented:
Done deal, thank you
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