Apple has apologized to a security researcher who detailed his “frustrating” experiences dealing with the company, after he disclosed bugs in the iOS operating system. Apple has been criticized for the alleged mishandling of security vulnerability alerts notified through its bug bounty program. Researchers claim that this is symptomatic of the company’s bug bounty program being riddled with complications, ranging from poor communication to unresolved payment issues. In security researcher Denis Tokarev’s post, he claims to have reported four zero-day vulnerabilities in Apple’s iOS mobile operating system. Zero-days refer to new bugs or security flaws in the system for which there are no patches currently available. After reporting the issues to Apple, Tokarev said that Apple ignored three of them, and released a patch for the fourth one. But when the latest iOS version, 15.0, was released, the patch was not covered in the company’s security content page, and Tokarev was …