I am not aware of any issue accessing the web interface of the SG200-26 from an OS X computer. If you were able to access it at one time, the IP address of the switch has possibly changed. It is possible the switch got a new IP address from the router.
Can you ping the IP address of the switch? If you can't ping the switch, check your router's DHCP client table to see if the router gave the switch an IP address. If that doesn't work, you can also try factory defaulting the switch.
Introduction:Topology Diagram:Configuration Overview:Related
Information: Introduction: This document describes how to connect SG300
with Catalyst switch via STP. Spanning Tree Protocol (STP) is a Layer 2
protocol that runs on mainly on switches. The spec...
On a technical level, Cisco 300 Series is far superior to the HP 1910
and 2530 products. This document provides evidence that Cisco has >100
features not supported by the HP platforms. Check this out and decide
for yourselves. Notes (2/5/2014):- Informati...
The Sx500 Series Stackable Switches offers different port features. You
can add security to a port, make the port more energy efficient, map a
VLAN to a port, make a port available or not to a specific network
portion, and so forth. The next set of articl...