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A new variant of the Mac Defender scareware that has plagued Mac OS X users since the beginning of the month no longer asks users for their admin password during installation.

Mac Defender is probably the first widespread Mac malware attack and it caught a lot of users off guard, exactly like antivirus experts predicted for years.

Apple's strategy of advertising Macs as virus free definitely paid off for the company in terms of sales, but created a false sense of security for users.

The only thing that kept malware writers away from the Mac plantform all these years was a low return on investment.

Learning how to code for Mac and maintaining a separate version of their malicious programs for an operating system that didn't have that many users simply wasn't worth it.

However, security experts warned that this will change and it appears it has already started, Mac Defender being a good example of how unprepared Mac users are when it comes to malware attacks.

If a Mac is not University-managed, this change WILL NOT affect the device. Enrolling a device in the University's Mac management system will give users access to the most up to date operating system, antivirus protection, and other software solutions.

Mac Defender are distributed through search result poisoning campaigns that have been around for years and are pretty much a common occurrence.

• Microsoft is bringing its Windows Defender anti-malware application to macOS—and more platforms in the future—as it expands the reach of its Defender Advanced Threat Protection (ATP) platform.
• Mac Defender (also known as Mac Protector, Mac Security, Mac Guard, Mac Shield, and FakeMacDef) is an internet rogue security program that targets computers running macOS.The Mac security firm Intego discovered the fake antivirus software on 2 May 2011, with a patch not being provided by Apple until 31 May.

The new variant, called MacGuard, is delivered through a downloader application named avRunner which is installed by a avSetup.pkg file.

AvSetup.pkg is automatically downloaded when users visit one of the rogue search result pages and for certain Safari configurations it is even auto-executed.

'Unlike the previous variants of this fake antivirus, no administrator's password is required to install this program,' Mac antivirus vendor Intego warns.

'Since any user with an administrator's account – the default if there is just one user on a Mac – can install software in the Applications folder, a password is not needed,' the company explains.

The password prompt displayed by Mac Defender's installation routine could have served as an indication that something is wrong. Unfortunately, the people behind this malware have figured out that it's unnecessary.

Introduction

AirDrop is an ad-hoc service in Apple Inc.'s OS X and iOS operating systems, introduced in Mac OS X Lion (aka OS X 10.9) and iOS 7 that enables users to transfer files to another supported Mac computer and iOS mobile device without using email or a mass storage device. OS X Mavericks (version 10.9) and iOS 7 use different AirDrop protocols and are currently not interoperable. AirDrop in OS X or earlier operates over Wi-Fi, whereas the iOS implementation utilizes both Wi-Fi and Bluetooth. Once OS X 10.10 Yosemite and iOS 8 are released however, users will be able to AirDrop between their computer and mobile device. OS X Yosemite AirDrop, like iOS before it, now uses Bluetooth LE for discovery and direct Wi-Fi for transfer. That's really the best of both worlds, as you get the low-energy savings of BT LE for the connection and the race-to-sleep efficiency of Wi-Fi for the transfer.

Limitations
There is currently no size restriction to how large a file can be sent over AirDrop, Apple users have reported movie files over 10GB being sent over AirDrop without any problems. A restriction on AirDrop is that the two computers have to be within 10 meters of each other for AirDrop to recognize the other party. To date only a small number of applications implement the AirDrop facility.

Ethernet Support
Currently, OS X Mavericks doesn't officially allow you using AirDrop in-between computers using ethernet, but at the Marriott Library an other campus locations we administrate we have implemented a modification that allows this support. Currently, this feature only works in computers in the same subnet, due to the use of Bonjour (aka Zeroconf or Multicast DNS).

Enabling AirDrop over Ethernet

To enable AirDrop to run on OS X Mavericks via ethernet you can use the following command:

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