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I am developing a Java app that integrates with SmartCard reader. One of the features that I try to implement is reading/setting terminal (card reader) configuration without a tag being present on the reader. This can be done by sending so called escape codes. But to enable these escape codes we need to enable them in the driver. In case of macOS this will be SmartCardServices and the file that I should edit is: /usr/libexec/SmartCardServices/drivers/ifd-ccid.bundle/Contents/Info.plist I need to set ifdDriverOptions property to 0x0001. This procedure was described in this helpful GitHub comment https://github.com/pokusew/nfc-pcsc/issues/13 I tried to follow other instructions provided there but I hit the wall with read-only file system error. I wonder if there is an idiomatic way to change these settings. Why this is important? Sending new configuration via escape command is the only way to un-brick terminal that was (by mistake) wrongly configured.