How can I change the cache size Google Chrome uses? ON OS X? I've found countless posts how do to things on Windows but couldn't really figure out from that how to do things on os x.

Help will be highly appreciated, thanks.

  • By the way, the maximum number you can set is 2147483647. Otherwise it would complain not convertible to integer(It's stored as an signed integer in Chrome).
    – Ditty
    Oct 13, 2013 at 19:15

3 Answers 3


You would have to launch it from the command line with the following flag --disk-cache-size=524288000, where 524288000 is the upper limit of what it could be set to.
You could try to make a script that launches it with the augment.

Something like:


/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --disk-cache-size=524288000 &

Then name it with a .sh extension, and chmod u+x /path/to/file.sh and you should be good.

  • Is there no way to add the argument to the default shortcut? :/
    – AreusAstarte
    Jun 1, 2013 at 16:55
  • To my knowledge, apple doesn't make it easy to use run time flags with GUI apps; which is why I suggested writing a short script.
    – demure
    Jun 1, 2013 at 17:05

You could try to create a plist file com.google.Chrome.plist in /Library/Preferences with following content:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  • Good. It would have been easier to point out that the number meant 500MB. This is a better method as it doesn;t sideStep if you start Chrome via Launcher. On a similar note, is stuff in /Library/Preferences deleted when you upgrade Mac OSX?
    – nyxee
    Mar 24, 2017 at 15:45

You can try

defaults write com.google.Chrome DiskCacheSize -integer 3145728000

to set it to 3GB.

  • 2
    Any way to validate this is working? Jul 22, 2020 at 16:40
  • does it count for total cache size or per profile?
    – Karl Adler
    Nov 17, 2021 at 7:46

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