One may purchase a DisplayPort to HDMI Adapter at: Amazon, E Bay, Future Shop, Best Buy, Apple Store, Dell, Costco, London Drugs, Tiger Direct, Monoprice.
Yes, but you will need a Mini Display to HDMI adapter.1Connect the mini display side of your mini-display-to-HDMI adapter to the back of your iMac.2Connect the other side of the mini display cord to the corresponding port in your adapter box.3Connect your HDMI cable from your Xbox HDMI port to the HDMI port of your adapter.4Plug in the adapter box and turn on any power buttons, if applicable. Turn on the Xbox.5Press "Command-F2" to switch from the iMac display mode to the Xbox display mode. Your Xbox interface should now appear on your iMac screen.There are multiple mini-display-to-HDMI adapter boxes on the market; before you purchase one, check any available reviews to make sure it is compatible with the iMac, or use Apple's "About Mini DisplayPort to HDMI Adapters" page to find out if the adapter you want to use will work with your iMac.
There are many places where one could purchase HDMI to VGA adapters and cables. Some of the cheapest and most trusted places are Walmart and Best Buy.
You will need an adapter like this. http://www.walmart.com/ip/Sabrent-Mini-DisplayPort-Thunderbolt-to-HDMI-Adapter-4K-Support-Gold-Plated-DA-MDHA/49457649
It's unlikely that HDMI based video will work with a DisplayPort input. Although DisplayPort can be connected to an HDMI input with a passive adaptor, DisplayPort does not support broadcast color space such as YUV. HDMI can accept and display the RGB format used by DisplayPort but DisplayPort cannot handle YUV which is typically output from a Bluray player. DisplayPort is an emerging standard and during the time it is being implemented, there will be numerous practical adaptations to the capabilities of DisplayPort. For that reason, this answer may not be valid in the future. Indeed, it is likely that there are already products that can handle YUV so the only sure way to find out if it works is to try it.
Here is a picture of an usb to hdmi adapter "http://www.amazon.com/eForCity-Micro-USB-HDMI-Adapter/dp/B005NG71K8" . One can buy it for example on amazon or at the local electronic store.
A fair price for an USB to HDMI is around $17. Some sites sell it for even cheaper like eBay or Amazon. One can also purchase an USB to HDMI from stores like Suture shop or Best Buy.
You can go online or to any electronic store to buy a hdmi to vga cable. This is a cable that has the hdmi adapter on one end and the vga adapter on the other end. This way you can convert a hdmi device into a vga device.
One can purchase a Wii to HDMI adapter online at amazon where he or she can choose the best one for them, and also at any local best buy store one will be able to find the product of their desire.
HDMI switches are devices that direct multiple HDMI cables into one input. One can purchase them at sites like Amazon and eBay, who offer different styles and sizes.
The StarTech.com HDMI to DVI-D Video Cable Adapter is a good one.
There are many places where one can purchase a Netgear WG111v2 adapter. One can purchase a Netgear WG111v2 adapter from popular on the web sources such as Amazon and eBay.
There are several good companies which stock a good quality hdmi to dvi adapter, many of them also have online shops so you can order by post if you wish. You can also check the local forums and ask for hdmi to dvi adapter recommendations, and for a price check, one of the comparison websites will prove useful.