The trick, however, is finding where Apple hides those firmware files. Simply copy the firmware file from the first computer you used to update your device to any other computer that syncs with devices that need updating. If you have multiple devices syncing to multiple computers, however, there’s a workaround that can help you avoid re-downloading hundreds of megabytes each time. Thankfully, iTunes is smart enough to store the firmware update after it’s been downloaded the first time, and it will reuse that file to update subsequent devices of the same type on the same machine. The increased size of firmware updates is a necessary result of increased functionality but, when multiple iDevices need updating, the download times and bandwidth cap hits can be noticeable. What started out as small 10 to 30 MB updates for the first few generations of iPods has evolved into 500+ MB behemoths (the latest iOS update as of this post, 5.1.1, weighed in at nearly 850 MB). As the popularity of those devices has increased, however, so too has the size of the firmware updates. Many households now have multiple iPhones, iPads, or iPods.
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December 2022
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