You see a message that an application program can’t be found.

The following dialog box appears if you try to open a document that was created with software that is not on your hard disk.

Normally, you see this message if you try to open a document that came from another Macintosh with software that is different from yours.

mSome documents can be opened by more than one application program. Try starting a program that you think might be able to open the document, then choose Open from the program’s File menu to try to open the document.

mPurchase and install the correct software to use the document, or find out if the creator of the document can convert it to a form that one of your programs can use.

mDon’t try to open the files in your System Folder. Most of the files in your System Folder are used by your computer for internal purposes and are not intended to be opened.

mRebuild your desktop by holding down the Option and x keys while starting up your computer. Keep holding down the keys until you see a message asking whether you want to rebuild the desktop. Click OK.

mIf the document is from a DOS computer, use the PC Exchange control panel to specify which Macintosh program will open the document. For information about working with DOS documents on your Macintosh, see

the “Using DOS Files & Disks” topic of Macintosh Guide, available in the Guide (h) menu.

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Apple 550 series, 570 series manual You see a message that an application program can’t be found

570 series, 550 series specifications

The Apple 550 and 570 series are notable entries in Apple's lineup of devices, typically recognized for their blend of performance, efficiency, and user-friendly design. With a focus on delivering high-quality features, these series have attracted attention from both tech enthusiasts and general consumers alike.

The Apple 550 series is anchored by its sleek design, often characterized by an aluminum chassis and vibrant Retina display. One of the standout features of this series is its use of the M1 chip, which enhances performance across applications while maintaining impressive battery life. This chip, based on ARM architecture, integrates an 8-core CPU and an 8-core GPU, allowing for seamless multitasking and exceptional graphics performance. Additionally, the 550 series boasts elevated RAM options, making it suitable for power users and professionals in creative fields.

On the other hand, the Apple 570 series builds on the foundation of its predecessor, offering new advancements while retaining core features that users love. The 570 series also utilizes the M1 chip, but with the evolution of the series, Apple may introduce enhancements such as increased clock speeds or supplementary cores for even greater performance gains. This series is often highlighted for its advanced thermal management system, ensuring that the devices run cooler under heavy workloads.

Both series support industry-leading technologies such as Thunderbolt 3 and USB-C, enabling high-speed data transfer and versatile connectivity options. This feature is particularly beneficial for users who require fast access to external storage, displays, or docks. Furthermore, these devices typically come with upgraded audio systems that provide clear, immersive sound, enhancing the multimedia experience for users, whether during casual listening or professional production.

In terms of build quality, both the 550 and 570 series are designed with sustainability in mind, incorporating recycled materials and energy-efficient components. They also run on macOS, which offers a robust ecosystem, ensuring a seamless user experience across Apple devices.

With exceptional performance, cutting-edge technologies, and commitment to sustainability, the Apple 550 and 570 series stand out as impressive offerings within the technology landscape, catering to a diverse range of users from everyday consumers to creative professionals.