The cries for help from frazzled Mac owners whose Wi-Fi connections went haywire after upgrading to OS X Yosemite are being met by Apple with stone-faced silence.

Affected users have been filing a steady stream of complaints about the problem in discussion forums, blogs and social media sites since Apple released the latest version of the operating system a week ago.

Attempts by users to isolate the cause of the issue have been fruitless so far. The problem affects a variety of Macs with dissimilar configurations and linked to many different routers. What’s clear is that the problem hit these users after installing Yosemite. In most cases, Wi-Fi becomes unstable, with connections dropping every few minutes, irritatingly slow or simply unusable.

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