[Yosemitest]

It made an improvement to my computer's speed.

[no-to-illegals]

Bkm

[Spktyr]

nexdefinstall.dmg is not a standard issue file on Mac OS. You downloaded something at some point, dude.

[cynwoody]

I have no idea what you are talking about.

A quick google indicates that the file in question has something to do with watching major league baseball.

I would advise anyone never to install any .dmg without due diligence as to its provenance and verifying the checksum against a trusted source.

[lefty-lie-spy]

NexDef appears to be something specific to MLB.Com, meaning that pretty much no one needs to care. You should really elaborate on what you are trying to warn us about because I didn’t find anything on a virus relating to this plug-in.

[Jonty30]

Apple would never let viruses on their computer. It’s impossible.

[Spktyr]

The only place you can find that file is here:

http://mlb.mlb.com/shared/media/nexdef/v2013_129/nexdefinstall.dmg

You watch any baseball since 2013?

[Swordmaker]

Any .dmg file is a DISK IMAGE, it cannot run unless you decompress the disk image and mount it to the Finder, and then open and execute the files that are in the disk. It is not an executable program or application file that can do anything at all.

Anything in it that is “Infected” is not going to affect your computer as it is just a stored file until it is unpacked, mounted as a disk, then the apps installed, and then executed. That cannot happen until YOU as the user, do it. It certainly cannot affect the speed of your computer.

If there was an infected file found by your anti-virus in that “nexdefinstall.dmg” file, it is the equivalent of finding a virus in an email package that has yet to be opened: it’s advisory only. . . and don’t mount that disk image.