Browse and web service. A mic is an input device and as such, access to it is given at the discretion of the user. If your Mac is able to detect mic input from the System Preferences app, but an app isn’t able to pick it up, it might be a problem with permissions or with the app. To check what’s wrong, run a mic test from your web browser. Test questions for Mac OS x 10.6.x support essentials exam. Below is a selection of ten questions similar in style and content to those presented in the Mac OS X Support Essentials 10. Please note that UNIX commands and processes are shown in mono-space font, and you are free to take the quiz as many times as you want in your revision.

Amazon EC2 Mac instances enable customers to run on-demand macOS workloads in the cloud for the first time, extending the flexibility, scalability, and cost benefits of AWS to all Apple developers. With EC2 Mac instances, developers creating apps for iPhone, iPad, Mac, Apple Watch, Apple TV, and Safari can provision and access macOS environments within minutes, dynamically scale capacity as needed, and benefit from AWS’s pay-as-you-go pricing.

Powered by AWS Nitro System, EC2 Mac instances are built on Apple Mac mini computers featuring Intel Core i7 processors, and offer customers a choice of macOS Mojave (10.14), macOS Catalina (10.15), and macOS Big Sur (11.2.1). Access the Amazon EC2 Mac User Guide here.

Benefits

Quickly provision macOS environments

Time and resources previously spent building and maintaining on-premises macOS environments can now be refocused on building creative and useful apps. Development teams can now seamlessly provision and access macOS compute environments to enjoy convenient, distributed testing and fast app builds, bringing additional choice to developers so they can use Mac as their trusted platform, on-premises or in the cloud. EC2 Mac instances offload the heavy lifting that comes with managing infrastructure to AWS, which means Apple developers can focus entirely on building great apps.

Reduce costs

EC2 Mac instances allow developers to launch macOS environments within minutes, adjust provisioned capacity as needed, and only pay for actual usage with AWS’s pay-as-you-go pricing. Developers save money since they only need to pay for the systems that are in use. For example, more capacity can be used when building an app, and less capacity when testing.

Extend your toolkits

EC2 Mac instances provide developers with seamless access to dozens of AWS services so they can more easily and efficiently collaborate with team members, and develop, build, test, analyze, and improve their apps. Similar to other EC2 instances, customers can easily use EC2 Mac instances together with AWS services and features like Amazon Virtual Private Cloud (VPC) for network security, Amazon Elastic Block Storage (EBS) for expandable storage, Amazon Elastic Load Balancer (ELB) for distributing build queues, Amazon FSx for scalable file storage, and AWS Systems Manager (SSM) for configuring, managing, and patching macOS environments.

Features

Built on Apple Mac hardware

Amazon EC2 Mac instances are built on Apple Mac mini computers, featuring 8th Generation 3.2GHz (4.6GHz turbo) Intel Core i7 processors with 6 physical/12 logical cores, and 32GiB of Memory.

Enabled by the AWS Nitro System

The AWS Nitro System is a rich collection of building blocks that offloads many of the traditional software-defined functions to dedicated hardware and software to deliver high performance, high availability, and high security. Amazon EC2 Mac instances are uniquely enabled by the AWS Nitro System, which makes it possible to offer Mac mini computers as fully integrated and managed EC2 instances to provide 10 Gbps of VPC network bandwidth and 8 Gbps of EBS storage bandwidth.

Scaled on highly reliable infrastructure

EC2 Mac instances are designed so that customers can build critical applications with confidence. AWS has the most secure, extensive, and reliable global infrastructure for running workloads that require high availability, and is recognized as an industry leader for uptime standards. EC2 Mac instances enable your macOS workloads to benefit from the scale, elasticity, reliability, and experience that AWS’s secure, on-demand infrastructure has offered to millions of customers for more than a decade.

Product Details

Pricing

EC2 Mac instances are available for purchase as Dedicated Hosts through On Demand and Savings Plans pricing models. Billing for EC2 Mac instances is per second with a 24-hour minimum allocation period to comply with the Apple macOS Software License Agreement. Through On Demand, you can launch an EC2 Mac host and be up and running within minutes. At the end of the 24-hour minimum allocation period, the host can be released at any time without further commitment. With Savings Plans, you can save up to 44% off On Demand pricing with a 3-year commitment. Both Compute and Instance Savings Plans are available. For more information on Dedicated Hosts, please see the Dedicated Hosts product page. In addition to the table below, you can also access EC2 Mac pricing on the AWS Pricing Calculator for Dedicated Hosts.

• North America (N. Virginia, Ohio, Oregon)

• 3-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.083	$0.611	$0.650	$0.702	$0.764	$0.780	$0.842
  Savings over On-Demand	N/A	44%	40%	35%	29%	28%	22%

  1-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.083	$0.849	$0.867	$0.910	$1.019	$1.040	$1.083
  Savings over On-Demand	N/A	22%	20%	16%	6%	4%	0%

• 3-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.354	$0.764	$0.812	$0.764	$0.955	$0.975	$1.053
  Savings over On-Demand	N/A	44%	40%	35%	29%	28%	22%

  1-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.354	$1.062	$1.083	$1.137	$1.274	$1.300	$1.354
  Savings over On-Demand	N/A	22%	20%	16%	6%	4%	0%

• 3-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.207	$0.681	$0.724	$0.782	$0.852	$0.869	$0.939
  Savings over On-Demand	N/A	44%	40%	35%	29%	28%	22%

  1-year term
  Purchase Option	On-Demand	Instance Savings Plan			Compute Savings Plan
  Terms	Pay-as-you-go	All Upfront	Partial upfront	No Upfront	All Upfront	Partial upfront	No Upfront
  								Price per Hour	$1.207	$0.947	$0.996	$1.104	$1.136	$1.159	$1.207
  Savings over On-Demand	N/A	22%	20%	16%	6%	4%	0%

Customers

'Intuit is a mission-driven, global financial platform company. Its products - including TurboTax, QuickBooks, and Mint - are designed to empower more than 50 million consumer, small business and self-employed customers around the world to improve their financial lives. EC2 Mac instances, with their familiar EC2 interfaces and APIs, have enabled us to seamlessly migrate our existing iOS and macOS build-and-test pipelines to AWS, altogether improving developer productivity. We’re experiencing up to 30 percent better performance over our data center infrastructure, thanks to elastic capacity expansion, and a high availability setup leveraging multiple zones. We’re now running around 80 percent of our production builds on EC2 Mac instances, and are excited to see what the future holds for AWS innovation in this space.'

Pratik Wadher, VP of Product Development, Intuit

Listen to Pratik Wadher, the VP of Product Development at Intuit, describe how and why Intuit is using Amazon EC2 Mac instances.

“FiLMiC, Inc. is the creator of the award-winning mobile cinema camera app, FiLMiC Pro. With a global team of filmmakers, photographers, creatives and software developers who share the same passion for mobile cinema and content creation, FiLMiC has designed what has become the industry's most sought-after app that transforms a simple mobile device into a cinematic film camera. Amazon EC2 Mac instances give us the ability to scale up our continuous integration build farm in order to quickly go through development, testing and TestFlight stages. This leads to better velocity and more time working on the fun stuff.”

Seth Faxon, iOS Development Manager, FiLMiC

“At Ring, we are committed to making home and neighborhood security accessible and effective for everyone while working hard to bring communities together. EC2 Mac instances will allow us to migrate our Apple build infrastructure to AWS, unlocking the scalability, reliability, security, and capabilities of AWS for all our Apple developers. These EC2 Mac instances will also let us quickly scale up our Mac build fleet whenever we need it, simplify cross-platform app development through consolidation on a single infrastructure provider, and ultimately accelerate innovations for thousands of our Apple customers.”

Joshua Roth, CTO

Resources

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The Macintosh II is a personal computer designed, manufactured, and sold by Apple Computer from March 1987 to January 1990. Based on the Motorola 68020 32-bit CPU, it is the first Macintosh supporting color graphics. When introduced, a basic system with monitor and 20 MB hard drive cost US$5,498 (equivalent to $12,373 in 2019). With a 13-inch color monitor and 8-bit display card the price was around US$7,145 (equivalent to $16,079 in 2019).^[1] This placed it in competition with workstations from Silicon Graphics, Sun Microsystems, and Hewlett-Packard.

The Macintosh II was the first computer in the Macintosh line without a built-in display; a monitor rested on top of the case like the IBM PC and Amiga 1000. It was designed by hardware engineersMichael Dhuey (computer) and Brian Berkeley (monitor) and industrial designerHartmut Esslinger (case).

Eighteen months after its introduction, the Macintosh II was updated with a more powerful CPU and sold as the Macintosh IIx. In early 1989, the more compact Macintosh IIcx was introduced at a price similar to the original Macintosh II, and by the beginning of 1990 sales stopped altogether. Motherboard upgrades to turn a Macintosh II into a IIx or Macintosh IIfx were offered by Apple.

Development[edit]

Two common criticisms of the Macintosh from its introduction in 1984 were the closed architecture and lack of color; rumors of a color Macintosh began almost immediately.^[2]

The Macintosh II project was begun by Dhuey and Berkeley during 1985 without the knowledge of Apple co-founder and Macintosh division head Steve Jobs, who opposed expansion slots and color, on the basis that the former complicated the user experience and the latter did not conform to WYSIWYG—color printers were not common.^[3] He instead wanted higher-resolution monochrome displays.^[4]

Initially referred to as 'Little Big Mac', the Macintosh II was codenamed 'Milwaukee' after Dhuey's hometown, and later went through a series of new names. After Jobs was fired from Apple in September 1985, the project could proceed openly.

The Macintosh II was introduced at the AppleWorld 1987 conference in Los Angeles,^[5] with low-volume initial shipments starting two months later.^[6] Retailing for US $5,498,^[7] the Macintosh II was the first modular Macintosh model, so called because it came in a horizontal desktop case like many IBM PC compatibles of the time. Previous Macintosh computers use an all-in-one design with a built-in black-and-white CRT.

The Macintosh II has drive bays for an internal hard disk (originally 40 MB or 80 MB) and an optional second floppy disk drive. It, along with the Macintosh SE, was the first Macintosh to use the Apple Desktop Bus (ADB) introduced with the Apple IIGS for keyboard and mouse interface.

The primary improvement in the Macintosh II was Color QuickDraw in ROM, a color version of the graphics routines. Color QuickDraw can handle any display size, up to 8-bit color depth, and multiple monitors. Because Color QuickDraw is included in the Macintosh II's ROM and relies on 68020 instructions, earlier systems could not be upgraded to display color.

In September 1988, shortly before the introduction of the Macintosh IIx, Apple increased the list price of the Macintosh II by roughly 20%.^[8]

Hardware[edit]

CPU: The Macintosh II is built around the Motorola 68020 processor operating at 16 MHz, teamed with a Motorola 68881floating point unit. The machine shipped with a socket for an MMU, but the 'Apple HMMU Chip' (VLSI VI475 chip) was installed that did not implement virtual memory (instead, it translated 24-bit addresses to 32-bit addresses for the Mac OS, which would not be 32-bit clean until System 7).

Memory: The standard memory was 1 megabyte, expandable to 8 MB.^[9] The Mac II had eight 30-pin SIMMs, and memory was installed in groups of four (called 'Bank A' and 'Bank B').

The original Macintosh II did not have a PMMU by default. It relied on the memory controller hardware to map the installed memory into a contiguous address space. This hardware had the restriction that the address space dedicated to bank A must be larger than those of bank B. Though this memory controller was designed to support up to 16MB 30-pin SIMMs for up to 128MB of RAM, the original Macintosh II ROMs had problems limiting the amount of RAM that can be installed to 8MB. The Macintosh IIx ROMs that also shipped with the FDHD upgrade fixed this problem, though still do not have a 32-bit Memory Manager and cannot boot into 32-bit addressing mode under Mac OS (without the assistance of MODE32).^[10]MODE32 contained a workaround that allowed larger SIMMs to be put in Bank B with the PMMU installed. In this case, the ROMs at boot think that the computer has 8MB or less of RAM. MODE32 then reprograms the memory controller to dedicate more address space to Bank A, allowing access to the additional memory in Bank B. Since this makes the physical address space discontiguous, the PMMU is then used to remap the address space into a contiguous block.

Graphics: The Macintosh II includes a graphics card that supports a true-color 16.7 million color palette^[11] and was available in two configurations: 4-bit and 8-bit. The 4-bit model supports 16 colors on a 640×480 display and 256 colors (8-bit video) on a 512×384 display, which means that VRAM was 256 KB. The 8-bit model supports 256-color video on a 640×480 display, which means that VRAM was 512 KB in size. With an optional RAM upgrade (requiring 120ns DIP chips), the 4-bit version supports 640×480 in 8-bit color.^[12] The video card does not include hardware acceleration of drawing operations.

Display: Apple offered a choice of two displays, a 12' black and white unit, and a more expensive 13' high-resolution color display based on Sony's Trinitron technology. More than one display could be attached to the computer, and objects could be easily dragged from one screen to the next. Third-party displays quickly became available. The Los Angeles Times reviewer called the color 'spectacular.'^[13] The operating system user interface remained black and white even on color monitors with the exception of the Apple logo, which appeared in rainbow color.

Storage: A 5.25-inch 40 MB internal SCSI hard disk was optional, as was a second internal 800 kilobyte 3.5-inch floppy disk drive.

Expansion: Six NuBus slots were available for expansion (at least one of which had to be used for a graphics card, as the Mac II had no onboard graphics chipset and the OS didn't support headless booting). It is possible to connect as many as six displays to a Macintosh II by filling all of the NuBus slots with graphics cards. Another option for expansion included the Mac286, which included an Intel 80286 chip and could be used for MS-DOS compatibility.

The original ROMs in the Macintosh II contained a bug that prevented the system from recognizing more than one megabyte of memory address space on a Nubus card. Every Macintosh II manufactured until approximately November 1987 had this defect. This happened because Slot Manager was not 32-bit clean.^[14] Apple offered a well-publicized recall of the faulty ROMs and released a program to test whether a particular Macintosh II had the defect. As a result, it is rare to find a Macintosh II with the original ROMs.^{[citation needed]}

Accessories: The Macintosh II and Macintosh SE were the first Apple computers since the Apple I to be sold without a keyboard. Instead the customer was offered the choice of the new ADB Apple Keyboard or the Apple Extended Keyboard as a separate purchase. Dealers could bundle a third-party keyboard or attempt to upsell a customer to the more expensive (and higher-profit) Extended Keyboard.

Audio: The Macintosh II was the first Macintosh to have the Chimes of Death accompany the Sad Mac logo whenever a serious hardware error occurred.

The new extensions featured for the Macintosh II at the time were A/ROSE and Sound Manager.^{[citation needed]}

Mac Os 9 Installer

Models[edit]

The Macintosh II was offered in three configurations. All systems included a mouse and a single 800 KB 3.5-inch floppy disk drive; a 68551 PMMU was available as an option.^[15]

• Macintosh II CPU: 1 MB RAM.
• Macintosh II 1/40 CPU: 1 MB RAM, internal 40-megabyte SCSI HDD.
• Macintosh II 4/40 CPU: 4 MB RAM, internal 40-megabyte SCSI HDD.

Timeline of Macintosh II models

Mac Os 9 Download

References[edit]

1. ^Edwards, Benj (June 7, 2012). 'The Macintosh II celebrates its 25th anniversary'. Macworld.
2. ^Bartimo, Jim (February 25, 1985). 'Macintosh: Success And Disappointment'. InfoWorld. p. 30. Retrieved January 27, 2015.
3. ^'The Color Convergence'.
4. ^Webster, Bruce (December 1985). 'Microcomputer Color Graphics-Observations'. BYTE. p. 405. Retrieved October 28, 2013.
5. ^'Local Area Networks Newsletter'. Vol. 5 no. 4. April 1987. p. 1.Cite magazine requires magazine= (help)
6. ^'Apple Begins Shipments Of Macintosh II Computer'. Wall Street Journal. May 8, 1987.
7. ^'Mac GUI :: Macintosh II and Macintosh SE announced'. macgui.com. Retrieved April 11, 2018.
8. ^Michael Wang (September 13, 1988). 'Apple price increases'. Newsgroup: comp.sys.mac. Usenet:3642@Portia.Stanford.EDU.
9. ^Apple Announces 68030 Macintosh IIx With High Density Compatible DriveArchived September 8, 2012, at archive.today by John Cook and Carol Cochrane, Business Wire 09/19/88 (retrieved September 20, 2009)
10. ^Series: The 24-bit ROM Blues by Adam C. Engst, Tidbits, April 22, 1991 (retrieved September 21, 2009)
11. ^'OLD-COMPUTERS.COM : The Museum'. www.old-computers.com. Retrieved April 11, 2018.
12. ^'Macintosh II High Resolution Video Card'. lowendmac.com. June 7, 1989. Retrieved April 11, 2018.
13. ^Magid, Lawrence J. (March 2, 1987). 'Apple's Two New Machines Are Dandy'. Los Angeles Times. Retrieved June 20, 2019. ...the color is spectacular. Unlike most color monitors, it also displays very readable text.
14. ^InfoWorld Magazine, October 26, 1987, p.47
15. ^'Macintosh II - Product Details'(PDF). Apple.

External links[edit]

Test 2 Mac Os X

• Mac II profile on Low End Mac
• Macintosh II technical specifications at apple.com