application manager quit unexpectedly 10.10.5

As i know, Spigot is an Adware!

here is a link how to remove it. http://www.thesafemac.com/arg-spigot/

You can do it by hand as macudo says, or download MalwyrebytesAntiMalware (on the same page) and run it, it is from the same writer Thomas Reed.

Don't use any kind of "anti-virus" or "anti-malware" product on a Mac. There is never a need for it, and relying on it for protection makes you more vulnerable to attack, not less.

You installed the "Spigot" ad-injection malware. Take the steps below to disable it.

Malware is always changing to get around the defenses against it. This procedure works as of now, as far as I know. It may not work in the future. Anyone finding this comment a few days or more after it was posted should look for a more recent discussion, or start a new one.

Back up all data before continuing.

1. Triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:

~/Library/LaunchAgents

In the Finder, select

Go ▹ Go to Folder...

from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return. A folder named "LaunchAgents" will open.

2. Inside the folder you just opened, there may be one or more files with a name beginning as follows:

com.spigot

Move all such items to the Trash.

Log out or restart the computer. The trojan will now be inactive, but there are a few more components of it that should be cleaned up.

3. Do as in Step 1 with this line:

~/Library/Application Support

and remove an item named

Spigot

If it's present.

Empty the Trash.

4. From the Safari menu bar, select

Safari ▹ Preferences... ▹ Extensions

Uninstall all extensions you don't know you need, including any with the word "Spigot" in the description. If in doubt, remove all of them. None is required for normal operation. Do the equivalent in the Chrome and Firefox browsers, if you use either of those.

Make sure you don't repeat the mistake that led you to install the malware. Chances are you got it from an Internet cesspit such as "Softonic," "CNET Download," or "SourceForge." Never visit any of those sites again. You might also have downloaded it from an ad in a page on some other site. The ad would probably have included a large green button labeled "Download" or "Download Now" in white letters. The button is designed to confuse people who intend to download something else on the same page. If you ever download a file that isn't obviously what you expected, delete it immediately.

In the Security & Privacy pane of System Preferences, select the General tab. The radio button marked Anywhere should not be selected. If it is, click the lock icon to unlock the settings, then select one of the other buttons. After that, don't ignore a warning that you are about to run or install an application from an unknown developer.

Still in System Preferences, open the App Store or Software Update pane and check the box marked

Install system data files and security updates (OS X 10.10 or later)

or

Download updates automatically (OS X 10.9 or earlier)

if it's not already checked.

Don't worry about macudo's and my post. Use it. Absolutely trustworthy, as you can see in hundreds of threads here.

Your question brings up the subject of removing adware. This is a general comment on that subject.

The only tools that anyone needs to detect and remove adware are the Finder and a web browser, both of which you already have. Anyone who has enough computer skill to install adware can just as well remove it without using anything else.

Under no circumstances should you ever allow anti-virus software to delete something for you.

Apple doesn't endorse any third-party "anti-virus" or "anti-malware" product. Here and here are its general statements about malware protection, and here are its instructions for removing the most common types of ad-injection malware. None of those support pages mentions anti-malware products. An Apple employee who recommends such a product is speaking only for himself or herself, not for the company. See this thread for an example of what the results can be.

You become infected with malware by downloading unknown software without doing research to determine whether it's safe. If you keep making that mistake, the same, and worse, will keep happening, and no anti-malware will rescue you. Your own intelligence and caution are the only reliable defense.

The Windows/Android anti-malware industry had more than $75 billion in sales in 2014 [source: Gartner, Inc.] Its marketing strategy is to convince people that they're helpless against malware attack unless they use its products. But with all that anti-malware, the Windows and Android platforms are still infested with malware—most of it far more harmful than mere adware. The same can be expected to happen to the Mac platform if its users trust the same industry to protect them, instead of protecting themselves.

You are not helpless, and you don't have to give full control of your computer—and your data—to strangers in order to be rid of adware.

These are generalities. Regarding the "malwarebytes" product in particular, you may be told that there are no reports that is has caused damage. In fact, there is such a report by ASC user LizardMBP in this thread. Draw your own conclusions from that report.

You can also search this site for thousands of other comments on all kinds of anti-malware by ASC members other than myself. Below are a few examples, all quoted from different discussions.

I am unaware of any completely harmless Mac anti-virus software. They are all made by Windows software developers who know nothing about Macs. At best, they will slow your machine down and could easily corrupt important file[s] and/or databases.

There will always be threats to your information security associated with using any Internet - connected communications tool... Assuming that any product will protect you from those threats is a hazardous attitude...

Antivirus software does more damage to Macs that the malware does.

We spend far more time here on the support forums cleaning up problems with antivirus software than we do cleaning up problems with viruses.

The only malicious software is the anti-virus or "clean up" software itself.

If you'd like to see links to the quoted discussions, ask.

I did according to the guide and it solved my problem. Thank you macudo!

Thank you very much for this fix. I'm running El Capitan on a MacBook Pro and the fix still worked perfectly.