1. Mac Os Versions
2. Mac Os Mojave
3. Download New Mac Os
4. Rainbow Blocks Mac Os X

The rainbow-colored circle is a painful sight to see for Mac users. If you’re lucky it disappears in a few seconds, but more often it remains for minutes, leaving you helplessly locked out of the app or your whole Mac. Apr 27, 2020 Rainbow Mosaics has raised the bar once again with a delightful Easter-themed Mosaic filled with Easter Bunnies, Chickens, Easter Eggs and Baskets, in beautiful, high-contrast colors. Rainbow Mosaic puzzles are always logic-based and always challenging, and I love the Tetris style mini-game that reveals the hidden (?) number! Make sure you have updated to Mac OS X v10.5.1 or later. Then, use these steps to enable the application firewall: Choose System Preferences from the Apple menu. Click the Firewall tab. Choose what mode you would like the firewall to use. In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity. A block cipher by itself is only suitable for the secure cryptographic transformation (encryption or decryption) of one fixed-length group of bits called a block.

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.

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]

Mac Os Versions

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]

Mac Os Mojave

• 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.

Download New Mac Os

There are not many things I miss from Mac OS 9. But there’s one that was really useful: the ability to test a hard drive surface. OS 9 disk formatter (I don’t even recall it’s name) had a “Test Disk” option that would perform a surface scan of the selected hard drive. That was awsome to test for bad blocks on the drives.

Unfortunately, that’s impossible to do with Mac OS X, at least with it’s built-in software. There are some commerical applications to do that (like TechTool Pro), but I get a little pissed off when I have to spend a lot of money buying a software that does a zillion things when all I want is surface scans, and specially when I could do it with the “old” OS and not with the new powerful UNIX-based one.

Well, Linux has the badblocks command that will do just that: test the disk surface for bad blocks. It’s a simple UNIX command, so I thought there must be a port of that to OS X (and, of course, I could try to compile it in OS X as last resource). After some googling, I found out badblocks is part of the ext2fs tools. And, fortunately, Brian Bergstrand has already done the port to OS X, including a nice installer.

The installer installs all the ext2fs stuff, including an extension that will allow you to access ext2fs volumes on OS X. As always, this is a somewhat risky operation. Personally, I avoid as many extensions as I can, because they run too close to the kernel for me to feel confortable. So, if possible, install it on a secondary OS (like an utility/recover system on an exteral hard drive, or so).

The badblocks command will be installed in /usr/local/sbin/badblocks, and it will probably not be on your PATH, so you have to type the entire path when using, or edit your PATH environment variable.

Rainbow Blocks Mac Os X

Usage is simple. First, run the “mount” command, so that you know the device names for the drives you want to test. You can obtain something like this:

arroz% mount
/dev/disk0s3 on / (local, journaled)
devfs on /dev (local)
fdesc on /dev (union)
on /.vol
automount -nsl [142] on /Network (automounted)
automount -fstab [168] on /automount/Servers (automounted)
automount -static [168] on /automount/static (automounted)


The internal hard drive is /dev/disk0 (note that /dev/disk0 is the entire drive, /dev/disk0s3 is a single partition). Imagining you want to test the internal hard drive you would type the command (as root):

badblocks -v /dev/disk0

This would start a read-only test on the entire volume. The -v is the typical verbose setting, so you may follow what’s happening. This will take a long time, depending on the hard drive you use. For a 160 GB hard drive, it took between 2 and 3 hours in a G5 Dual 2 Ghz.

I mention this because time is an important factor when testing hard drives! You should run badblocks on a known-to-be-in-good-condition hard drive, so that you can get the feeling of how fast (or slow) badblocks is. Later, if you test a possibly failing hard drive, and badblocks progresses notably slower, it will probably mean that the hard drive is in bad condition (even if it doesn’t have badblocks).

After running the command, you may get two results: your disk has, or hasn’t badblocks! 🙂 You will see many outputs of a successful surface scan, so I leave here an example of a not-so-successful one:

/usr/local/sbin arroz$ sudo ./badblocks -v /dev/disk0
Password:
Checking blocks 0 to 156290904
Checking for bad blocks (read-only test): 120761344/156290904
120762872/156290904
120762874/156290904
done
Pass completed, 3 bad blocks found.


This is the result of a test on a 160 GB hard drive with 3 bad blocks.

After getting something like this, you may try to run badblocks again, in write mode. Note that this will destroy all the information you have on the hard drive! badblocks won’t copy the information to memory, and than back to disk. It simple destroys it. The point of running a write-enabled badblocks check is forcing the hard drive to remap the damaged sectors. Hard drives have a reserved space to use when bad blocks are found. The bad blocks are remapped to that reserved space, until it fills. And this will only happen on a write. So, run badblocks in write mode, and then again in read-only mode. If badblocks finds no bad blocks, your hard drive is fine (for now). If badblocks still finds bad blocks, it means that there are so many damaged blocks on the disk surface that the reserved area is full. Forget it, and throw the disk away. It’s useless.