Windows may display a 2727 installer error or restart pending message when you upgrade from Boot Camp 2.2 on a Mac running Mac OS X 10.5 (Leopard) to Boot Camp 3.0 on a Mac running Mac OS X 10.6 (Snow Leopard).[...]

You can use the keyboard shortcuts outlined in this article to shut down or restart Macs that have a keyboard with an Eject key. Note: Key names are separated by a hyphen (-), such as "Control-Eject". You do not type the hyphen as part of the key combination.[...]

This document outlines security updates for Apple products. For the protection of our customers, Apple does not disclose, discuss or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website. Important: This document describes updates and releases for January 15, 2008 and later, such as Security Update 2008-001. For information about earlier security updates, see these documents: Apple security updates (25-Jan-2005 to 21-Dec-2007) Apple security updates (03-Oct-2003 to 11-Jan-2005) Apple security updates (August, 2003 and earlier) Obtaining Mac OS X Information about obtaining Mac OS X (client) can be found here. Information about obtaining Mac OS X Server can be found here. Software updates for Mac OS X are available via: Software Update preferences Apple Downloads Apple Product Security PGP Key For information, see "How to use the Apple Product Security PGP Key".[...]

This document describes the security content of Safari 4.0.5. For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website. For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key." Where possible, CVE IDs are used to reference the vulnerabilities for further information. To learn about other Security Updates, see "Apple Security Updates."[...]

If network access is interrupted, a Mac OS X v10.6 client may not be able to reconnect to an Active Directory domain whose name ends in ".local".[...]

You can use Migration Assistant to transfer your files and important settings from an older Mac to a new one.[...]

If you use "Restore System From Backup…" to restore a Time Machine backup to a different Mac than the original Mac used for the backup, issues such as these may occur: Graphic anomalies may appear during startup, or may follow the mouse pointer AirPort or Bluetooth may not be available The Mouse System Preference pane may not display the Magic Mouse or its features Brief graphic distortion may appear when shutting down an iMac Other startup issues [...]

Your Mac might not immediately sleep after you attempt to put it to sleep.  Or, if you have configured your Mac to sleep when idle for a period of time, it may not go to sleep automatically.[...]

Mac OS X v10.6 Snow Leopard includes software for many printer and scanner models.  This software can be installed from the Snow Leopard Install DVD, and installed or updated by using Software Update (some models have software available through Software Update only).   This article lists software provided for printers and scanners as of 15 Dec, 2009. To view the complete list of printers and scanners that are supplied with Snow Leopard Install DVD and by Software Update, see below or use your browser's Find feature to look for a specific name or model number. If you cannot find a driver for your specific model, check the list to see if a driver is available for a series of printers that may include your model.  For example, a printer with the model number 5070 might use the driver for the "5000 Series". For more information about setting up and using printers in Snow Leopard, see this article. For information about troubleshooting printer setup issues, see this article.[...]

Are you having issues sending, receiving, or configuring Mail? If so, ask your Internet Service Provider (ISP, such as Comcast, RoadRunner, AOL, and so forth), or email service provider (ESP, such as Gmail, Hotmail, Yahoo, Apple's MobileMe, and so forth) if it's different than your ISP, the following questions to verify that your account is set up correctly in Mail. You can print (or copy and paste to a text document) and keep this "cheat sheet" to record your email provider's settings for future reference. This sheet can make it easier for you when configuring Mail in Mac OS X or on iPhone or iPod touch, or when contacting your provider.[...]

Learn about using named streams over SMB connections in this advanced article. Named streams are used to store Mac OS X extended attributes and can be leveraged to avoid using AppleDouble files to store the data fork and the resource fork of legacy Mac files. Mac OS X Server v10.5 and v10.6, as well as many Network Attached Storage (NAS) devices, support named streams when you connect to them via SMB.  Microsoft Windows servers with NTFS-formatted hard drives also support named streams when you connect to them via SMB; named streams are called "Alternate Data Streams" in Windows. Mac OS X v10.5 and v10.6 clients automatically enable named streams support when they have a SMB connection to a Mac OS X Server v10.5 or v10.6-based server.  Mac OS X v10.6 clients automatically enable named streams over SMB when the NAS or Windows server claims to support it.  See below for details about how to activate Mac OS X v10.5 client support of named streams over SMB connections to a NAS or Windows server. You can enable named streams in three different ways, as described below.[...]

Learn which digital camera RAW files are supported by Mac OS X v10.5 Leopard or later. Many digital cameras offer options to save pictures in digital camera RAW format. Digital camera RAW formats retain more image information than JPEGs and can produce better results when used with imaging applications such as Aperture and iPhoto. Mac OS X Leopard provides system-level support for digital camera RAW formats from the following cameras.[...]

Learn which digital camera RAW files are supported by Mac OS X v10.6 Snow Leopard, or later. Many digital cameras offer options to save pictures in digital camera RAW format. Digital camera RAW formats retain more image information than JPEGs and can produce better results when used with imaging applications such as Aperture and iPhoto. Mac OS X Snow Leopard provides system-level support for digital camera RAW formats from the following cameras.[...]

When you attempt to connect to the Internet, you may see alert messages such as: "The server could not be found." "The specified server could not be found." "A connection failure has occurred." "Connection attempt failed." "Name servers not responding." Despite the alert, some Internet (TCP/IP) applications may function normally. Tip: In Mac OS X v10.4 or later, you can click the "Assist me" button in the Network preference pane, then follow the onscreen prompts for network diagnostics. However, the following information is good for any version of Mac OS X.[...]

Learn which versions of Mac OS X ship with Intel-based Macs. If you have a PowerPC-based Mac, see Mac OS: Versions, builds included with PowerPC Macs (since 1998) instead. Important: Do not use a Mac OS X version earlier than the one included with the computer.[...]

One or more of the following may occur: Mail app unexpectedly quits when trying to access mail or iPhone or iPod touch displays "Home" screen when trying to access mail or Mail account on the iPhone or iPod touch shows blank account title/description in Settings > Mail, Contacts, Calendars screen as shown here:   [...]

In this advanced article, learn how to capture a packet trace; for example, you may be asked to do this when troubleshooting a network connectivity issue.  These steps use Terminal and the the tcpdump command; if you are not familiar with using the Terminal, you may want to use for third-party software that can perform a packet trace instead.[...]

When you import DNG, TIFF, or JPEG images that contain embedded IPTC metadata, some of the metadata does not import: Creator: Address, City, State, Postal Code, Country, Phone, Email, and Web IPTC Subject Code Date Created Intellectual Genre IPTC Scene Location Country Code Usage Terms [...]

When you choose Metadata > Write IPTC Metadata to Masters, any IPTC Core fields you have populated are not written to the master images.[...]

When you import RAW+JPEG images from a Nikon camera, RAW images shot in portrait orientation may not be rotated properly but the JPEGs are correctly oriented.[...]

If you attempt to install Microsoft Windows XP SP3 on an Intel-based Mac (Mac Pro, Mac Mini, MacBook, MacBook Air, MacBook Pro, or iMac) that is running Windows XP SP2 via Boot Camp, an "Out of disk space" alert may appear even when there may be adequate disk space to install the update.[...]