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In certain situations, iPhone 4S may have difficulty recognizing a micro-SIM card, resulting in the following behaviors: "Invalid SIM" or "No SIM Card installed" alert appears intermittently. Status bar displays "No Service" or "Searching" in a location with good network coverage.

In certain situations, iPhone 4S may have difficulty recognizing a micro-SIM card, resulting in the following behaviors: "Invalid SIM" or "No SIM Card installed" alert appears intermittently. Status bar displays "No Service" or "Searching" in a location with good network coverage.

The log tab for the DNS service in Server Admin reports "The selected log file does not exist".

The log tab for the DNS service in Server Admin reports "The selected log file does not exist".

In OS X Lion and Lion Server v10.7 through v10.7.2, if a file on a locally mounted Xsan volume has been edited by multiple users on different systems, you may see the following alert message when trying to save the file: "The operation couldn’t be completed. (GSLibraryErrorDomain error 1.)"

In OS X Lion and Lion Server v10.7 through v10.7.2, if a file on a locally mounted Xsan volume has been edited by multiple users on different systems, you may see the following alert message when trying to save the file: "The operation couldn’t be completed. (GSLibraryErrorDomain error 1.)"

Learn about the Login window message when FileVault 2 is enabled.

Learn about the Login window message when FileVault 2 is enabled.

Learn about the Login window message when FileVault 2 is enabled.

Learn how to set up a Mac for surround sound playback using DVD Player or iTunes.

Learn how to set up a Mac for surround sound playback using DVD Player or iTunes.

Learn how to set up a Mac for surround sound playback using DVD Player or iTunes.

Specific versions of Aperture are compatible with OS X Lion.

Specific versions of Aperture are compatible with OS X Lion.

If you open MainStage 2.2 or Logic Pro 9.1.6 from a volume other than the startup disk (such as an external hard drive), you may be asked to download additional content. That content may download but not install. This can occur if you purchased these applications from the Mac App Store.

If you open MainStage 2.2 or Logic Pro 9.1.6 from a volume other than the startup disk (such as an external hard drive), you may be asked to download additional content. That content may download but not install. This can occur if you purchased these applications from the Mac App Store.

Learn more about Logic Pro 9 with these resources.

Learn more about Logic Pro 9 with these resources.

Use the resources below to help get support and find answers to your Logic Pro 9 questions.

Use the resources below to help get support and find answers to your Logic Pro 9 questions.