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Let me try to access IMac remotely. &nbsp;Maybe I can figure that out. &nbsp;I will report back shortly. &nbsp;Thank you!!
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Let me try to access IMac remotely.  Maybe I can figure that out.  I will report back shortly.  Thank you!!

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The IP Phone was the problem. &nbsp;Phone reboot solved the problem. &nbsp; Weird!
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The IP Phone was the problem.  Phone reboot solved the problem.   Weird!

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May have been an IP address conflict.
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He had to reboot the computer and after the reboot the computer is not accessing our network via the Ethernet but only thru the wireless router. &nbsp;As such, his voip phone isn’t working.<br />
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What's the problem?
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He had to reboot the computer and after the reboot the computer is not accessing our network via the Ethernet but only thru the wireless router.  As such, his voip phone isn’t working.

What's the problem?

User cannot access network after reboot on iMac.

Apple's early computers ran on a variety of operating systems, including a Pascal version and one based on CP/M, before releasing its ProDOS with the advent of its 16-bit computer. With the release of the Lisa, which had its own OS, Apple and computing entered the graphical age; it was followed by the Macintosh, which offered a series of "System" operating systems. Other Mac operating systems included PowerPC until Apple acquired NeXT and folded it into the Mac OS. Current operating systems for Apple devices are Mac OS-X and iOS.

Apple OS

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Programs written for the Apple operating systems are distinguished from software created for other operating systems in that it must be approved by Apple for use on its devices, whether it is from Apple (Final Cut, iWork, Keynote, Logic Pro and GarageBand are popular titles), or is a third party application from Parallels, Nuance, Microsoft and Amazon, among many others.