Mac OS X System requirements

Currently, Joost runs only on the latest Macintosh computers equipped with Intel processors. Recommended minimum specifications are as follows:

Any Intel-based Mac running OS X 10.4
512 MB or more RAM
About 500 MB free disk space
The Joost software is a 15 MB download, expanding to 35-40 MB on disk. The remainder is used as a cache

Broadband/ADSL (1 Mbit/s downstream, 512 Kbit/s upstream recommended, although lower speeds may well work)
In 1 hour of viewing, 320 MB will be downloaded and 105 MB uploaded, which means that a 1 GB cap will be exhausted in about 10 hours (see important note below)

Network settings

You'll need to check that your firewall or router is configured to allow access by Joost application. In particular, make sure that the following are enabled:

TCP access, outbound, to ports 80, 443 and 5223.
UDP access, outbound, to port 4166 and 33333.
If you want to chat from within Joost, you'll also need to enable inbound TCP access to port 5223.

Check also that your network has DNS servers configured – Joost software makes regular DNS requests like any other application.

Important notice for users with limits on their internet usage

You need to read this carefully if:

you have an upper limit on your monthly internet usage, or
you pay for internet usage as you go (i.e. you pay per megabyte you download, instead of a flat fee).

Joost is a streaming video application. It actively manages available bandwidth, and when it senses bandwidth might be saturated, it automatically limits usage. In any case, Joost uses a relatively high amount of bandwidth per hour, which means that it could exceed a 1 GB cap in a few hours.

If you pay for your bandwidth usage per megabyte or have your usage capped by your ISP, you should be careful to always exit the Joost software completely when you are finished watching it.

To stop using bandwidth, you need to exit the software completely in the normal way.

TV Anywhere, anytime