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NeXTStep 1.0 used a monochrome icon resembling a spinning magneto-optical disk. [a] Some NeXT computers included an optical drive, which was often slower than a magnetic hard drive. This made it a common reason for the wait cursor to appear. NeXTStep color (12 bit) When color support was added in NeXTStep 2.0, color versions of all icons were ...
Aqua is the successor to Platinum, which was used in Mac OS 8, Mac OS 9, and developer releases of Rhapsody (including Mac OS X Server 1.2). The appearance of Aqua has changed frequently over the years, most recently and drastically with the release of macOS Big Sur in 2020 which Apple calls the "biggest design upgrade since the introduction of ...
The Sad Mac icon is displayed, along with a set of hexadecimal codes that indicate the type of problem at startup. Different codes exist for different errors. This is in place of the normal Happy Mac icon, which indicates that the startup-time hardware tests were successful. The icon itself remained unchanged throughout most of the Classic Mac ...
On Mac OS X 10.6 Snow Leopard, Exposé featured a new organized grid view and allowed users to activate Exposé from the Dock. In Mac OS X 10.7 Lion, some features of Dashboard, Exposé, and Spaces were incorporated into Mission Control. This gave an overview of all running applications just like "All windows" but grouped windows from the same ...
Head-of-line blocking (HOL blocking) in computer networking is a performance-limiting phenomenon that occurs when a queue of packets is held up by the first packet in the queue. This occurs, for example, in input-buffered network switches , out-of-order delivery and multiple requests in HTTP pipelining .
The Apple Icon Image format (.icns) is an icon format used in Apple Inc.'s macOS. It supports icons of 16 × 16, 32 × 32, 48 × 48, 128 × 128, 256 × 256, 512 × 512 points at 1x and 2x scale, with both 1- and 8-bit alpha channels and multiple image states (example: open and closed folders).
In TCP, the congestion window (CWND) is one of the factors that determines the number of bytes that can be sent out at any time. The congestion window is maintained by the sender and is a means of preventing a link between the sender and the receiver from becoming overloaded with too much traffic.
Dereferencing any of these variables could cause a segmentation fault: dereferencing the null pointer generally will cause a segfault, while reading from the wild pointer may instead result in random data but no segfault, and reading from the dangling pointer may result in valid data for a while, and then random data as it is overwritten.