New delay in boot

[cool11]

I am very concerned with any 'strange' sign in my mbp, because in the past, in other mac machines, I had some failures, and from this time then, I watch carefully for any change in the 'behavior' of my machine.

My mbp (late '13-yosemite-ssd), was booting in about 15 seconds. All the time, as far as I can remember.
Now it does not. It takes about 30 seconds.
And I can't tell that I installed anything 'strange' the last days.
I run 'etrecheck', no problems mentioned there.
A check in login items, did not showed me anything new.

Can you suggest if there is anything I check about this delay?
If there is any problem in the way and I could avoid it, it would be perfect.

 

[Samuelsan2001]

Mine often fluctuates with how long it takes to boot anywhere between 15 and 25-30 secs. Don't sweat it usually sorts itself out in the end. I always put it down to updates or trim or something similar just getting sorted out on boot up

 

[cool11]

You say it is possible to be nothing at all?
Is it normal one day to boot in 15 seconds,
and the next day in 30 seconds?

I am not using a stopwatch, but I can clearly see that there is a delay, unexplained to me.

 

[Samuelsan2001]

Yep happens to me quite often. I don't know if it's normal as such but it often happens to me especially after an update or some added software.

 

[cool11]

I am just worried, not so for the delay itself, but if it is a primary sign of a possible hardware failure.

 

[maflynn]

My MBP is usually quick but it does seem to fluctuate, though I've never really timed it.

 

[SlCKB0Y]

Can you suggest if there is anything I check about this delay?
If there is any problem in the way and I could avoid it, it would be perfect.

Is the delay before the Apple logo appears? If so, your default startup disk isn't set properly.

If the delay occurs after the Apple logo appears then do a verbose boot to see where the delay is:
https://support.apple.com/en-au/HT201573

Starting up in single-user or verbose mode

1. Shut down your Mac if it is on.
2. Press the power button to start the computer.
3. Immediately press and hold the Command key and either of the following:

• the "s" key for single-user mode. (Command-S)
• the "v" key for verbose mode. (Command-V)

 

[cool11]

The delay is before the Apple logo.
So, anything that I could do?

 

[SlCKB0Y]

The delay is before the Apple logo.
So, anything that I could do?

System Preferences > Startup Disk > Select your OS X volume.