Attackers were able to compromise an administrator account for the website, which is hugely popular with iPhone developers, and covertly distribute an exploit which targeted zero-day vulnerabilities in Adobe Flash and Java plugins.
“We're very sorry for the inconvenience - we'll work tirelessly to ensure your data's security now and in the future,” he added.
The attacks show a high degree of planning and skill, using previously unknown vulnerabilities and targeting high-value users, noted Sean Sullivan, a security researcher at F-Secure.
As Macs typically account for about 15 percent of internet users, making them too small a target to attract the attention of most hackers, Sullivan wrote on the F-Secure blog.
"But in the 'developer world', Macs have a much higher percentage of market share. In Silicon Valley we'd guesstimate it's probably the inverse of the real-world: 85 percent," he wrote.
"As such, there is relatively high motivation for bad guys to develop 'sophisticated' attacks that incorporate Mac-based payloads."
Apple, Facebook and Twitter have all subsequently confirmed that a handful of their staff had their laptops compromised, suggesting the attackers' tactics paid off. All three have claimed no personal data had been put at risk.
The attacks also raise questions about Apple's patching policy, and how much Apple knew about the potential risks before the attacks took place, said F-Secure's Sullivan.
“Apple began removing old versions of Java from Macs when people updated OS X in October 2012. Was that a proactive or reactive decision? How many times has Apple been compromised?” he asked.
Apple had not immediately responded to V3's request for comment on Sullivan's concerns.
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