The update sent to developers via email notes that the status of its various systems and tools can still be checked via Apple's website. Most of the services are currently online, including the Dev Centers, software downloads, Apple's developer forums, and iTunes Connect.
The Dev Center websites returned a week and a half ago after being down for 8 days. Apple was prompted to pull its services offline after a hacker gained access to its systems.
Apple announced that in the downtime, it was working to completely overhaul its systems to prevent such security breaches in the future. The outage began in mid-July, and dragged on for more than a day before Apple commented on the issue and revealed that an "intruder" had breached its systems.
One researcher has claimed responsibility for the hack, and claims he meant no "harm or damage." But Apple has not confirmed whether that person is in fact responsible for the incident.
The full letter sent to developers on Monday is included below:
We sincerely appreciate your patience as we work to bring our developer program services back online, and we want to give you an update on our progress. The majority of our developer services are currently online, including Certificates, Identifiers & Profiles, Dev Centers, software downloads, Videos, Apple Developer Forums, iTunes Connect, Bug Reporter, App Store Resource Center, and access to pre-release documentation.
We plan to reinstate most of the remaining services this week: Xcode automatic configuration as well as access to license agreements, TSIs, program enrollments, and renewals in Member Center. You can check the availability of these systems on our status page.
As a reminder, if your membership was set to expire during this downtime, it has been extended and your apps will remain on the App Store and Mac App Store.
We apologize for the significant inconvenience that our downtime has caused and encourage you to reach out to our support team if you need any assistance.