Q: Start up is taking much time after upgrade to El Capitan

Hi there Md. Shoeb,

It sounds like your computer is taking too much time to start. I would use these steps from the following article about startup issues with Mac OS X:

Resolve startup issues and perform disk maintenance with Disk Utility and fsck

Try Safe Mode

If you're using Mac OS X 10.2 or later, you can start up your computer in Safe Mode, which includes an automatic disk check and repair. If you're using Mac OS X 10.1.5 or earlier, skip to the next section. A Safe Boot, which starts up your computer into Safe Mode, might allow you to start up your computer successfully. To do this, follow these steps:

1. Start up in Safe Mode.
2. After the system has fully started up, restart your computer again normally.

 

If your Mac successfully restarts, the issue should be resolved. If the issue continues, try using Disk Utility.

Try Disk Utility

Use these steps to use the Disk Utility app to verify or repair a disk.

1. If you're using OS X Lion or later, start the computer from Recovery System or Internet Recovery. If you're using an older version of OS X and your computer came with a Mac OS X Install disc, insert the installation disc and restart the computer while holding the C key instead.
2. When your computer finishes starting up, choose Disk Utility from the Utilities window, or from the Installer menu if you're started from an installation disc.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Startup Disk (usually named "Macintosh HD").
6. Click Repair. Disk Utility checks and repairs the disk.

CLOS