Inside your home folder is a —commonly written in Unix syntax as /Library, which means “a folder named Library at the root level of your home folder.” This folder is accessible only to you, and it’s used to store your personal settings, application-support files, and, in some cases, data. The files and folders in /Library are generally meant to be left alone, but if you’ve been using OS X for a while, chances are you’ve delved inside.
– Database file for Mac: for Mac OS X systems, Outlook stores the indices in a proprietary Database file and stores the data records as a series of files nested within folders. Each folder can. Before you can open a shared folder, you must know who granted you access and what type of folder it is. Read the Knowledge Base article on How To Share Folders In Outlook 2011/2016 For Mac for information on how to share a folder. This article describes two ways to open a shared folder.
![Mac Mac](http://cdn.osxdaily.com/wp-content/uploads/2016/12/library-folder-mac-os-2-610x470.jpg)
![Mac Mac](/uploads/1/2/5/4/125411191/360844858.jpg)
Perhaps you wanted to tweak something using a tip from Macworld, or elsewhere on the Web. Or maybe a developer asked you to delete a preference file, or grab a log file, while troubleshooting a program. Whatever the case may have been, up until Lion (OS X 10.7), you simply opened your Home folder to access the Library folder. But after upgrading to Lion, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, and yes even OS X 10.10 Yosemite, the first time you tried accessing your personal Library folder, you likely found.well, you didn’t find.
The folder was gone. The disappearing Library folder At least, that’s how it appears. But rest assured, regardless of your version of OS X, your personal Library folder is right where it’s always been, at the root level of your Home folder. It’s just that, starting in Lion, and continuing in Mountain Lion, Mavericks, and Yosemite, Apple has made the folder invisible. The reason for this move is presumably that people unfamiliar with the inner workings of OS X often open /Library and start rooting around, moving and deleting files, only to later discover that programs don’t work right, application settings are gone, or—worse—data is missing. This is the same reason Apple has always hidden the folders containing OS X’s Unix underpinnings: /bin, /sbin, /usr, and the like.
While I understand Apple’s motives here—I’ve had to troubleshoot more than a few Macs on which an inexperienced user has munged the contents of /Library—a user can have plenty of valid reasons for needing to access the personal Library folder. Luckily, as I mentioned, the folder is merely hidden, using a special file attribute called the hidden flag. You just need to know how to make the folder visible again. Mavericks now offers a simple setting to make the /Library folder visible. The setting you need to know If you’re still running Lion or Mountain Lion, making the /Library folder requires a little bit of work. (I came up with—no joke—.) But in Mavericks and Yosemite, Apple has made the task much more convenient, providing an easily accessible setting for toggling the visibility of your user-level Library folder. Here’s how to use it: Open your home folder (/Users/ yourusername) in the Finder.
Depending on your Finder settings, this may be as easy as simply opening a new Finder window. Otherwise, choose Home from the Finder’s Go menu ( Go Home); or press Shift-Command-H. Still in the Finder, choose View Show View Options (or press Command-J). Near the bottom of the resulting View-Options palette is a setting called Show Library Folder. Enable this option.
Your Library folder is immediately visible. Close the View-Options palette. You can access this setting at any time to toggle the visibility of your personal Library folder. For example, Macworld senior contributor Joe Kissell has found that applying an OS X update can make the folder invisible, requiring you to manually make it visible again. Now that the folder is visible, just remember to be careful—because, as I mentioned above, deleting or moving the wrong file(s) inside this folder could cause an application to misbehave, to lose its settings, or even to lose data.
January 28, 2013 This article describes the Microsoft Office Outlook data file types and their default locations on Windows and Mac OS X. What is an Outlook data file? To put it simple, an Outlook data file is a file where Outlook stores your emails, tasks and other Outlook related information. A data file can be located on your local disk or on a network path. Outlook data file types There are four Outlook data file types: –.PST files (Personal Folder files): this is the most common format, being used by the Windows version of Outlook 2003 (or newer) to store received, sent & draft emails on your local hard disk.
Outlook PST files are not supposed to be shared or loaded from network locations, as the data loss risk is pretty high. The main advantage of a PST file is that you can access your emails offline, without requiring you to be connected to your email server (or to your email server web interface). This data file format is available for all non-Exchange email accounts, such as POP3 or IMAP accounts. –.PST Outlook data files (97-2002): this PST format does NOT support Unicode characters for your mailbox items and it offers less storage capacity.
Newer Outlook versions are compatible with this old data file format. –.OST files (Offline Outlook Data files): this is the data file format used by Outlook on Windows in conjunction with a Microsoft Exchange account, if you configured Outlook to keep a local copy of your mailbox items. It allows you to use the Microsoft Exchange Cached / Offline mode, so you can access your emails without staying connected to your Exchange server. Whenever new emails are received by your Microsoft Exchange server, Outlook will synchronize your OST file with the Exchange server. – Database file for Mac: for Mac OS X systems, Outlook stores the indices in a proprietary Database file and stores the data records as a series of files nested within folders.
Each folder can hold up to 1000 email items.