The standby test measures battery life by allowing a system, connected to a wireless network and signed in to an iCloud account, to enter standby mode with Safari and Mail applications launched and all system settings left at default.
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The Apple TV app movie playback test measures battery life by playing back HD 1080p content with display brightness set to 12 clicks from bottom or 75%. The wireless web test measures battery life by wirelessly browsing 25 popular websites with display brightness set to 12 clicks from bottom or 75%. Testing conducted by Apple in October 2019 using preproduction 2.3GHz 8-core Intel Core i9-based 16-inch MacBook Pro systems with 16GB of RAM and 1TB SSD.Battery life varies by use and configuration. The Apple TV app movie playback test measures battery life by playing back HD 1080p content with display brightness set to 8 clicks from bottom. Testing conducted by Apple in October 2020 using preproduction 13-inch MacBook Pro systems with Apple M1 chip, 8GB of RAM, and 512GB SSD.1TB = 1 trillion bytes actual formatted capacity less. Intel-based models are available with up to 32GB memory and up to 4TB storage.Testing conducted by Apple in October 2020 using preproduction MacBook Air systems with Apple M1 chip and 8-core GPU, configured with 8GB of RAM and 512GB SSD.1TB = 1 trillion bytes actual formatted capacity less.It's basically a full-blown programming language, designed to deal with text files one line at a time, and it's really useful it's also something you can pick up a little bit at a time, if you're so inclined.
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Type "man awk" in the terminal for a full description of the command. If max is not greater than zero, then something wrong happened (maybe ioreg doesn't have a line which says "MaxCapacity") and so return the character "?". If the variable max is greater than zero, then take the contents of the array labelled "CurrentCapacity", divide it by max, and multiply by 100. Next it prints out the result of the formula max>0?100*c/max:"?"which is an if-then statement (with the form test?true:false awk stole this notation from C). Second, it defines the variable max to be the contents of the array labelled "MaxCapacity" (which was defined in the first part of the process). First it sets OFMT="%.2f%%", which means to change the output format so that it outputs real numbers with two decimal places followed by a percentage sign (as above). The END segment means to run the following command after you're done reading in standard input. (Unlike in some languages, awk's arrays can be labelled with text, not just numbers.) Whenever column 3 ($3) contains the word "Capacity" ($3~/Capacity), it runs the command "c=$5", which stores the fifth column into an array (a box) labelled with the contents of the third column. This awk command starts by reading in each line of ioreg -l, one at a time. The printf command calculates $10/$5*100 (that is, the 10th column divided by the 5th column, times 100) and prints it as a floating-point number with 2 decimal places ("%.2f") followed by a percentage sign ("%%").Īwk '$3~/Capacity/ ' (So $5 is the 5th column's data and $10 is the 10th column's). This first awk command reads the standard input, one line at a time (if necessary I'm guessing only one line is being sent to it here), and splits the line into columns, the data in column c having the name $c.
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