These iMacs support OS X 10.11 El Capitan. The new iMac ships with OS X 10.5.2 Leopard and iLife ’08. The 2.66 GHz and faster models ship with 2 GB of RAM, a 320 GB hard drive, and use Radeon HD 2600 Pro graphics (Nvidia GeForce 8800 is a built-to-order option on the 24″ iMac). The 20″ 2.0 GHz iMac has 1 GB of RAM, a 250 GB hard drive, an 8x SuperDrive, Radeon HD 2400 XT graphics, AirPort Extreme, Bluetooth, and Apple’s aluminum keyboard and Mighty Mouse. This was the last iMac to use an Ultra ATA interface for its optical drive. The aluminum iMacs have three USB 2.0 ports, FireWire 400 and 800 ports, gigabit ethernet, 802.11n WiFi, Bluetooth 2.1+EDR, and an 8x SuperDrive – as well as a slim keyboard with USB 2.0 ports. The Early 2008 iMac also moved from the 800 MHz system bus in the Mid 2007 iMac to 1066 MHz, and clock speeds now range from 2.4 GHz to all the way up to a 3.06 GHz build-to-order option. Each volume within an APFS container can have its own APFS format-APFS, APFS (Encrypted), APFS (Case-sensitive), or APFS (Case-sensitive, Encrypted).Apple updated the iMac with Intel’s more efficient Penryn processor in April 2008, which has a larger Level 2 cache and includes the SSE4.1 instruction set. You can easily add or delete volumes in APFS containers. For example, folders named “Homework” and “HOMEWORK” are two different folders. For example, folders named “Homework” and “HOMEWORK” are two different folders.ĪPFS (Case-sensitive, Encrypted): Uses the APFS format, is case-sensitive to file and folder names, and encrypts the volume. Choose this option if you don’t need an encrypted or case-sensitive format.ĪPFS (Encrypted): Uses the APFS format and encrypts the volume.ĪPFS (Case-sensitive): Uses the APFS format and is case-sensitive to file and folder names. Each volume uses only part of the overall container, so the available space is the total size of the container, minus the size of all the volumes in the container.Ĭhoose one of the following APFS formats for Mac computers using macOS 10.13 or later.ĪPFS: Uses the APFS format. If desired, you can specify reserve and quota sizes for each volume. When a single APFS container has multiple volumes, the container’s free space is shared and is automatically allocated to any of the individual volumes as needed. macOS 10.13 or later supports APFS for both bootable and data volumes.ĪPFS allocates disk space within a container (partition) on demand. While APFS is optimized for the Flash/SSD storage used in recent Mac computers, it can also be used with older systems with traditional hard disk drives (HDD) and external, direct-attached storage.

Apple File System (APFS), the default file system for Mac computers using macOS 10.13 or later, features strong encryption, space sharing, snapshots, fast directory sizing, and improved file system fundamentals.

Format hard drive for imac 2008