Blue Sheep Mac OS

• Blue Sheep Mac Os Catalina
• Mac Os Mojave

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The spinning pinwheel is a variation of the mouse pointer arrow, used in Apple's macOS to indicate that an application is busy.^[1]

Officially, the macOS Human Interface Guidelines refers to it as the spinning wait cursor,^[2] but it is also known by other names, including the spinning beach ball^[3], the spinning wheel of death^[4], the spinning beach ball of death,^[5] or the ferris wheel of death.

Electric Sheep is a collaborative abstract artwork run by thousands of people all over the world. When their computers 'sleep', the Electric Sheep comes on and the computers communicate with each other by the internet to share the work of creating morphing abstract animations known as 'sheep'. Anyone watching one of these computers may vote for their favorite animations using the keyboard.

History[edit]

A wristwatch was the first wait cursor in early versions of the classic Mac OS. Apple's HyperCard first popularized animated cursors, including a black-and-white spinning quartered circle resembling a beach ball. The beach-ball cursor was also adopted to indicate running script code in the HyperTalk-like AppleScript. The cursors could be advanced by repeated HyperTalk invocations of 'set cursor to busy'.

Wait cursors are activated by applications performing lengthy operations. Some versions of the Apple Installer used an animated 'counting hand' cursor. Other applications provided their own theme-appropriate custom cursors, such as a revolving Yin Yang symbol, Fetch's running dog, Retrospect's spinning tape, and Pro Tools' tapping fingers. Apple provided standard interfaces for animating cursors: originally the Cursor Utilities (SpinCursor, RotateCursor)^[6] and, in Mac OS 8 and later, the Appearance Manager (SetAnimatedThemeCursor).^[7]

From NeXTStep to Mac OS X[edit]

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 and so was a common reason for the wait cursor to appear.

When color support was added in NeXTStep 2.0, color versions of all icons were added. The wait cursor was updated to reflect the bright rainbow surface of these removable disks, and that icon remained even when later machines began using hard disk drives as primary storage. Contemporary CD Rom drives were even slower (at 1x, 150 kbit/s).^[b]

With the arrival of Mac OS X the wait cursor was often called the 'spinning beach ball' in the press,^[8] presumably by authors not knowing its NeXT history or relating it to the hypercard wait cursor.

The two-dimensional appearance was kept essentially unchanged^[c] from NeXT to Rhapsody/Mac OS X Server 1.0 which otherwise had a user interface design resembling Mac OS 8/Platinum theme, and through Mac OS X 10.0/Cheetah and Mac OS X 10.1/Puma, which introduced the Aqua user interface theme.

Mac OS X 10.2/Jaguar gave the cursor a glossy rounded 'gumdrop' look in keeping with other OS X interface elements.^[9]In OS X 10.10, the entire pinwheel rotates (previously only the overlaying translucent layer moved).With OS X 10.11 El Capitan the spinning wait-cursor's design was updated. It now has less shadowing and has brighter, more solid colors to better match the design of the user interface. The colors also turn with the spinning, not just the texture.

System usage[edit]

In single-tasking operating systems like the original Macintosh operating system, the wait cursor might indicate that the computer was completely unresponsive to user input, or just indicate that response may temporarily be slower than usual due to disk access. This changed in multitasking operating systems such as System Software 5, where it is usually possible to switch to another application and continue to work there. Individual applications could also choose to display the wait cursor during long operations (and these were often able to be cancelled with a keyboard command).

After the transition to Mac OS X (macOS), Apple narrowed the wait cursor meaning. The display of the wait cursor is now controlled only by the operating system, not by the application. This could indicate that the application was in an infinite loop, or just performing a lengthy operation and ignoring events. Each application has an event queue that receives events from the operating system (for example, key presses and mouse button clicks); and if an application takes longer than 2 seconds^[10] to process the events in its event queue (regardless of the cause), the operating system displays the wait cursor whenever the cursor hovers over that application's windows.

This is meant to indicate that the application is temporarily unresponsive, a state from which the application should recover. It also may indicate that all or part of the application has entered an unrecoverable state or an infinite loop. During this time the user may be prevented from closing, resizing, or even minimizing the windows of the affected application (although moving the window is still possible in OS X, as well as previously hidden parts of the window being usually redrawn, even when the application is otherwise unresponsive). While one application is unresponsive, typically other applications are usable. File system and network delays are another common cause.

Guidelines, tools and methods for developers[edit]

By default, events (and any actions they initiate) are processed sequentially, which works well when each event involves a trivial amount of processing, the spinning wait cursor appearing until the operation is complete. If processing takes long, the application will appear unresponsive. Developers may prevent this by using separate threads for lengthy processing, allowing the application's main thread to continue responding to external events. However, this greatly increases the application complexity. Another approach is to divide the work into smaller packets and use NSRunLoop or Grand Central Dispatch.

• Bugs in applications can cause them to stop responding to events; for instance, an infinite loop or a deadlock. Applications thus afflicted rarely recover.
• Problems with the virtual memory system—such as slow paging caused by a spun-down hard disk or disk read-errors—will cause the wait cursor to appear across multiple applications, until the hard disk and virtual memory system recover.

Instruments is an application that comes with the Mac OS X Developer Tools. Along with its other functions, it allows the user to monitor and sample applications that are either not responding or performing a lengthy operation. Each time an application does not respond and the spinning wait cursor is activated, Instruments can sample the process to determine which code is causing the application to stop responding. With this information, the developer can rewrite code to avoid the cursor being activated.

Apple's guidelines suggest that developers try to avoid invoking the spinning wait cursor, and suggest other user interface indicators, such as an asynchronous progress indicator.

Alternate names[edit]

The spinning wait cursor is commonly referred to as the (Spinning) x (of Death/Doom).^[d] The most common words or phrases x can be replaced with include:

• Disk
• (Beach) Ball^[11][12]
• (Rainbow) wheel
• Pinwheel
• Pizza^[e]
• Pie
• Marble
• Lollipop

See also[edit]

Notes[edit]

1. ^NeXT Optical Discs, Photo of the underside, showing the rainbow effect depicted on the icon (a then new type of media that was built into the early NeXT Cubes.)
2. ^often an external AppleCD drive was used
3. ^not a single bit was changed
4. ^named after the Blue Screen of Death
5. ^frequently encountered across Mac users forums as The SPOD

References[edit]

1. ^'Mini-Tutorial: The dreaded spinning pinwheel; Avoiding unresponsiveness/slow-downs in Mac OS X'. CNet. 10 March 2005. Retrieved 16 July 2012.CS1 maint: discouraged parameter (link)
2. ^'macOS Human Interface Guidelines: Pointers'. developer.apple.com. Retrieved 2018-01-24.
3. ^'Troubleshoot the spinning beach ball'. Macworld. 2010-05-28. Retrieved 2020-03-22.
4. ^'How to Fix a Spinning Wheel of Death on Mac'. MacPaw. Retrieved 2020-03-22.
5. ^'Frozen: How to Force Quit an OS X App Showing a Spinning Beachball of Death – The Mac Observer'. www.macobserver.com. Retrieved 2020-03-22.
6. ^'Using the Cursor Utilities (IM: Im)'. Developer.apple.com. Retrieved 2010-04-30.CS1 maint: discouraged parameter (link)
7. ^'SetAnimatedThemeCursor'. Developer.apple.com. Retrieved 2010-04-30.CS1 maint: discouraged parameter (link)
8. ^Macworld 2002-04-01
9. ^Ars Technica Jaguar review: 'The dreading 'spinning rainbow disc' has an all new look in Jaguar'
10. ^'WWDC 2012 – Session 709 – What's New in the File System'(PDF). Apple. Retrieved 2018-05-23. Applications SPOD if they don’t service the event loop for two secondsCS1 maint: discouraged parameter (link)
11. ^Swain, Gregory E. (28 May 2010). 'Troubleshoot the spinning beach ball'. ((MacWorld)). Retrieved 16 July 2012.CS1 maint: discouraged parameter (link)
12. ^Todd, Charlie (9 March 2012). 'Spinning Beach Ball of Death'. ((Improv Everywhere)). Retrieved 16 July 2012.CS1 maint: discouraged parameter (link)

External links[edit]

• Apple Human Interface Guidelines: Standard Cursors from Apple's website.
• Perceived Responsiveness: Avoid the Spinning Cursor from Apple's website.
• Troubleshooting the 'Spinning Beach Ball of Death' Excerpt from “Troubleshooting Mac OS X” book where there are some information on how to deal with Spinning Wait Cursor problems.

Thanks for installing f.lux.

Your f.lux installer is a .zip file - it should be in your Downloads folder. Install f.lux by double-clicking it.

Once f.lux is installed and running, you should see the f.lux Preferences window appear. Here, you can enter your location and set your usual wake time. f.lux uses this information to create a custom lighting schedule for you.

You can open up Preferences any time to view and change your f.lux settings.

The f.lux menu can always be found to the left of your system clock.

f.lux Preferences

Daytime is whenever the sun is up in your location. By default, f.lux is at 6500K during the daytime, and does not change your screen’s color.

If you prefer very warm daytime colors, select Options> Expanded Daytime Settings from the f.lux menu.

Sunset is when the sun has set, but you are awake. If you are an early riser, this is also your pre-sunrise morning setting.

Sunset colors are designed to work well with normal warm white room lighting. If you usually wake up before sunrise, you might prefer a more moderate (4500K or brighter) Sunset setting.

Bedtime is the time before sleep when you’re getting ready for bed (or already in it).

The Bedtime setting changes with your wake time. It removes as much alerting light from your screen as possible so that you can feel your body growing tired. You can go to sleep anytime with f.lux - whenever you feel sleepy.

f.lux presets

The f.lux preferences window lets you change and preview settings. There are several presets you can choose from. f.lux will default to the Recommended colors preset.

Recommended colors: Use these for the first week while you get used to the change of colors and discover how you like to use f.lux.

Custom colors: Custom color control, click the time of day you want to change and then drag the slider to your preferred color temperature.

Classic f.lux: At sunset, f.lux will fade to 3400K, and turn off at sunrise. For large screens this setting is probably not strong enough to remove all alerting light.

Working late: for extreme night owls, removes solar timing and gives 14 hours of bright waking light.

Location

For most machines, f.lux can automatically detect your location with OS X Location Services.

You can also use postal codes (US only), the name of a nearby city, or map coordinates (find them on the map at justgetflux.com/map.html).

If you’ve been traveling, you might need to update your location. Make sure your computer’s internal Timezone settings are correct under System Preferences > Date & Time > Time Zone

Options

Fast transitions: 20 second fade at sunrise and sunset. When unchecked, f.lux changes gradually over one hour.

Sleep in on weekends: For people who want brighter light later on Friday and Saturday nights (and sleep in on Saturday and Sunday mornings)

Extra hour of sleep (ages 13-18): Starts Bedtime one hour earlier for teens and other people who need a little more sleep

Expanded daytime settings: Warmer daytime settings (to 1900K) for people who want to reduce eyestrain or match office lighting

Backwards alarm clock: Calculates how many hours remain until your wake time and gives reminders every thirty minutes when it gets very late

Dim on disable: Gentle fade on disable so it hurts less to check colors

Color Effects

Darkroom: Removes 100% of blue and green light and inverts colors. Darkroom mode also preserves night vision while using a screen.

Movie mode: Lasts 2.5 hours. Preserves colors and shadow detail for watching movies with reduced alerting light.

OS X Dark theme at sunset: Uses the normal theme during the day and switches to dark theme (dock and menu bar) each night at sunset. Disabling f.lux will also disable dark theme.

Disable

For an hour: Disables f.lux for one hour and returns your screen to its normal setting.

Until sunrise: Disables f.lux until your local sunrise.

For current app: Open the app you want to disable f.lux for, then choose this option to disable f.lux whenever a particular app becomes active. You can re-enable f.lux later by opening the app and unchecking this option.

If you often check colors after dark, you might like to use the Dim On Disable setting under Options.

About f.lux

This is where to find what version you have installed, see our contact information, and get a measurement of your screen’s current brightness.

Quit f.lux

This will quit the f.lux process and remove the f.lux icon from your menubar. Always quit f.lux before uninstalling or deleting files.

Troubleshooting: Answers to some common OS X questions

Installing

1. Click the f.lux Mac download link.
2. Click the zip file to expand it
3. Double click the 'Flux' application in your Finder window.
4. Enter your location and wake time

Uninstalling

1. Go to the f.lux Settings panel (to the left of your system clock)
2. Choose 'Quit f.lux'
3. In Finder, search for 'Flux' and select and delete the f.lux app by dragging it to the trash

Uninstalled but can’t delete files

1. Open Activity Monitor and select Flux
2. Choose Force Quit
3. Delete f.lux app by dragging it to the trash

Quit f.lux but the color still remains

Rebooting often fixes any problems with color tint. But if that does not help you, try the following:

1. Open Activity Monitor and verify there is no 'Flux' process running
2. In Finder, open System Preferences> Displays> Color
3. Delete the f.lux profile
4. Reboot if needed

Blue Sheep Mac Os Catalina

Other video display issues

Some Macbooks were recalled for problems with video hardware. You can check if your model is on the list at: https://www.apple.com/support/macbookpro-videoissues/

Flashing

Mac Os Mojave

On dual-GPU machines we write an ICC profile in order to make the “switch” between video cards more seamless. In some older machines, and every so often, this doesn’t work so well. You can use gfx.io to lock to one card, or to read about how this system works and disable if you want, check out our f.lux profile + prefs article.

If you still have questions about f.lux or need more help, you can check our FAQ or ask a question in our support forum.

Blue Sheep Mac OS