diff --git a/README.md b/README.md
index 7a9bb44..51b8272 100644
--- a/README.md
+++ b/README.md
@@ -201,6 +201,13 @@ them in a modprobe conf file. This file is provided within libnfc archive:
 
     sudo cp contrib/linux/blacklist-libnfc.conf /etc/modprobe.d/blacklist-libnfc.conf
 
+PN532 UART on macOS:
+--------------------
+
+- Receiving error: "Unable to set serial port speed to 115200 baud. Speed value must be one of those defined in termios(3)."
+  - The PN532 High Speed UART (HSU) requires a baud rate of 115200, however macOS may use the incorrect `termios.h` (valid path: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/termios.h) preventing the detection of the `B115200` definition producing the error above.
+  - Solution: Either add `-I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/termios.h` as an include path before the rest of your includes or manually add `#define B115200 115200`.
+
 FEITIAN bR500 and R502:
 -----------------------
 
@@ -214,7 +221,7 @@ Readers known to work:
 
 These readers are support by CCID since v1.4.25, make sure your CCID driver version higher or equal to 1.4.25.
 
-On MacOS, you can check your CCID version with the following command, and if required, you can install latest CCID driver from [https://github.com/martinpaljak/osx-ccid-installer/releases](https://github.com/martinpaljak/osx-ccid-installer/releases)
+On macOS, you can check your CCID version with the following command, and if required, you can install latest CCID driver from [https://github.com/martinpaljak/osx-ccid-installer/releases](https://github.com/martinpaljak/osx-ccid-installer/releases)
 
 ```
 grep -A 1 CFBundleShortVersionString /usr/local/libexec/SmartCardServices/drivers/ifd-ccid.bundle/Contents/Info.plist