Apple on Friday released a software update to fix a security hole that could allow hackers to "jailbreak" into iPad, iPhone and iPod Touch devices.

Earlier this month, the website www.jailbreakme.com had released a code that could be used to modify iOS, the operating system used in Apple’s mobile devices.

Such intrusions, known as jailbreaking, are usually used by customers to modify their devices so that they can use applications that are disapproved by the manufacturer.

Security experts said that the same code could be used to modify and and plant malicious software in the devices as well.

Apple had said that it would release an update to patch the vulnerability. Now, it has released the update at Apple’s online iTunes shop.

Meanwhile, the PC Mag has reported that the jailbreaking loophole software update released by Apple has itself been jailbroken.

With growing popularity, Mac computers have become the target for malware programmers.

In May, reports suggested that fake antivirus software, specifically targeting Apple computers, had been collecting credit card details from users by scaring them of non existent virus attacks.

Web security company Intego said that it had discovered fake antivirus softwares that have been targeting Apple users starting early May.

This is the first time such tactics have been employed to attack Macs, says Intego.