CP210x Macintosh OS VCP Driver v6 Release Notes
Copyright (C) 2017-2025 Silicon Laboratories Inc.

This release contains the following components:

* SiLabsUSBDriverDisk.dmg - Image containing the VCP Driver Installer
* ReleaseNotes.txt (this file)
* uninstaller.sh - a bash shell script for removing the driver

Known Issues and Limitations
----------------------------

	This release includes the Macintosh OS driver for 64 bit 
	Macintosh computers running MacOS X 10.11 or greater.
	For MacOS X 10.9 and 10.10, see the folder called "Legacy MacVCP Driver".

Driver Installation
-------------------

	Mount the DMG file and double click on 
	Silicon Labs VCP Driver. 
	On MacOS 10.13 and later, the installation of the driver may be blocked. 
	To unblock, open the System Preferences Security & Privacy pane and
	unblock the system extension. See Apple Technical Note TN2459
	"User-Approved Kernel Extension Loading" for more information.

Uninstalling the Driver
-----------------------

	To uninstall the driver, run the uninstaller.sh shell script from
	a Terminal command prompt. 

Release Dates
-------------
	CP210x Macintosh OS VCP Driver 6.0.3     - May 23, 2025
	CP210x Macintosh OS VCP Driver 6.0.2     - October 26, 2021
	CP210x Macintosh OS VCP Driver 6.0.1     - March 26, 2021
	CP210x Macintosh OS VCP Driver 6.0       - December 18, 2020
	CP210x Macintosh OSX VCP Driver 5.3.5    - February 25, 2020
	CP210x Macintosh OSX VCP Driver 5.3.2    - January 27, 2020
	CP210x Macintosh OSX VCP Driver 5.3.0    - January 20, 2020
	CP210x Macintosh OSX VCP Driver 5.2.4    - December 13, 2019
	CP210x Macintosh OSX VCP Driver 5.2.3    - December 6, 2019
	CP210x Macintosh OSX VCP Driver 5.2.2    - October 2, 2019
	CP210x Macintosh OSX VCP Driver 5.2.1    - September 9, 2019
	CP210x Macintosh OSX VCP Driver 5.2.0    - July 11, 2019
	CP210x Macintosh OSX VCP Driver 5.1.1    - July 1, 2019
	CP210x Macintosh OSX VCP Driver 5.1.0    - May 23, 2019
	CP210x Macintosh OSX VCP Driver 5.0.10   - March 27, 2019
	CP210x Macintosh OSX VCP Driver 5.0.9    - February 13, 2019
	CP210x Macintosh OSX VCP Driver 5.0.7    - December 17, 2018
	CP210x Macintosh OSX VCP Driver 5.0.6    - September 17, 2018
	CP210x Macintosh OSX VCP Driver 5.0.5    - July 13, 2018
	CP210x Macintosh OSX VCP Driver 5.0.4    - January 19, 2018
	CP210x Macintosh OSX VCP Driver 5.0.3    - November 21, 2017
	CP210x Macintosh OSX VCP Driver 5.0.2    - October 12, 2017
	CP210x Macintosh OSX VCP Driver 5.0.1    - Aug 25, 2017
	CP210x Macintosh OSX VCP Driver 5.0      - Aug 3, 2017
	CP210x Macintosh OSX VCP Driver 4.11.2   - June 16, 2017
	CP210x Macintosh OSX VCP Driver 4.11.1   - May 26, 2017
	CP210x Macintosh OSX VCP Driver 4.11.0   - May 2, 2017
	CP210x Macintosh OSX VCP Driver 4.x.17   - March 23, 2017
	CP210x Macintosh OSX VCP Driver 4.x.16   - Feb 3, 2017
	CP210x Macintosh OSX VCP Driver 4.x.15   - December 19, 2016
	CP210x Macintosh OSX VCP Driver 4.x.14   - November 3, 2016
	CP210x Macintosh OSX VCP Driver 4.x.13   - August 31, 2016
	CP210x Macintosh OSX VCP Driver 4.x.12   - June 15, 2016
	CP210x Macintosh OSX VCP Driver 4.x.11   - May 26, 2016
	CP210x Macintosh OSX VCP Driver 4.x.10   - April 6, 2016
	CP210x Macintosh OSX VCP Driver 4.x.9    - March 28, 2016
	CP210x Macintosh OSX VCP Driver 4.10.8   - March 2, 2016
	CP210x Macintosh OSX VCP Driver v3.1     - December 6, 2012


CP210x Macintosh OS Driver Revision History
--------------------------------------------
Version 6.0.3
	Added a feature where the CP210x device sends an XOFF signal to the connected device when macOS goes to sleep.
	Resolved an issue with driver uninstallation on macOS 13.
	Fixed an issue where the Mac OSX CP210x v6.0.2 VCP Driver could crash during stress testing.
	Added VID/PID for UAB DIELEKTRIK.
	Added VID/PID for Quell Tech Ltd.
	Added VID/PID for Profoto.
	Added VID/PID for Cambo Fotografische Industrie BV.
	Added VID/PID for ZTC WND-7300.
	Added VID/PID for Integrel Solutions Ltd.
	Added VID/PID for BRAIN MAGIC.
	Added VID/PID for ELV Elektronik AG.
	Added VID/PID for TDK Corporation.
	Added VID/PID for Regula Forensics.
	Added VID/PID for ALC Embedded Systems Ltd.
Version 6.0.2
	On macOS Big Sur:
		Fix issue that Xoff state is not remembered when macOS goes to sleep.
		Fix potential driver installation issue on some machines.
		Fix driver installation error on macOS Big Sur 11.5.
		Added VID/PID for Variable, Inc.
		Added VID/PID for Sony Corporation.
	On macOS Catalina or older:
		Support software flow control
		Fix driver installation error on macOS 10.14.
		Added VID/PID for Variable, Inc.
		Added VID/PID for Sony Corporation.

Version 6.0.1
	On macOS Big Sur: 	
		Fix issue with CP2105 that it cannot transfer data if Software flow control is enabled.
		Fix installation error under some conditions.
	On macOS Catalina or older: 	
		Add support for Line Break to the driver.
		Fix RTS doesn't go high if host PC buffer is full.
		Improve throughput.
	
Version 6.0
	Adds VID/PID for NECYD NLTAIR cp2105
	Supports macOS Big Sur with implementation of DriverKit extension

Version 5.3.5
	Adds VID/PID for QIVICON ZigBee Device, eq-3 HmIP USB, and BitronVideo Zigbee
	Addresses additional flow control bug.

Version 5.3.2
	Adds a lock to syncrhonize power event handling, state changes, 
	and driver unload to prevent an error.

Version 5.3.0
	Corrects an issue with state maintenance for the CTS, DSR, DCD lines.

Version 5.2.4
	Corrects a compatbility issue with MacOS 10.13 and earlier.

Version 5.2.3
	Corrects issues with the installer.

Version 5.2.2
	Adds VID/PID for RF Code.
	
Version 5.2.1
	Fixes a problem with the installer that prevents it from working
	correctly wiht MacOS 10.15 Catalina.

Version 5.2.0
	Fixes a bug in the installer that prevented it from working properly
	on MacOS 10.11 and 10.12
	Fixes a bug in the driver that could corruption requiring a reboot 
	if an attempt was made to unload the driver while a device was plugged
	in and using it

Version 5.1.1
	The driver now has a new installer intended to reduce user confusion 
	Added VID/PIDs for ST Link.

Version 5.1.0
	The driver is now Notarized for support of MacOS 10.14.5 and up. 
	See Apple Developer documentation about Notarization for more information.
	Added VID/PIDs for DECAGON DEVICES.

Version 5.0.10
	Added VID/PID for Sony Corporation.

Version 5.0.9
	Added VID/PID for TAMRON Co., Ltd.

Version 5.0.7
	Added VID/PID for GWinstek.
	
Version 5.0.6
	Added Alternative Silicon Labs VID/PID Sets.

Version 5.0.5
	Added VID/PID for RS DYNAMICS.

Version 5.0.4
	Added VID/PID for PICARO.

Version 5.0.3
	Added VID/PID for Lunatico Astronomia.

Version 5.0.2
	Added VID/PID for Sony Corporation.

Version 5.0.1
	Bug fixes.
	
Version 5.0
	Adds support for GPIO control.
	Updated for compatibility with MacOS 10.11 Kernel driver APIs. 
	This is a significant update to this driver.

Version 4.11.2
	Added VID/PID for Notch Dock.

Version 4.11.1
	Added VID/PID for HUSBZB-1: GoControl QuickStick Combo.

Version 4.11.0
	Fixed an issue that would cause the CP2102N to hang when a user space application disconnects while the device is receiving data.

Version 4.x.17
	Added VID/PID for METER USB.

Version 4.x.16
	Added VID/PID for Zero-Click.

Version 4.x.15
	Added VID/PID for NETGEAR.
	
Version 4.x.14
	Added VID/PIDs for Planar UltraRes.
	Added VID/PIDs for Coolon USB.

1Version 4.x.13
	Added VID/PIDs for Brim Brothers Ltd.
	Added VID/PIDs for 3D Tek

Version 4.x.12
	Added VID/PIDs for Juniper Networks, Inc.
	Added VID/PIDs for FluxData, Inc.

Version 4.x.11
	Corrected VID/PIDs for Findster Technologies, SA.

Version 4.x.10
	Added VID/PIDs for Mark-10 Corp.

Version 4.x.9
	Added VID/PIDs for Findster Technologies, SA and for CMA.

Version 4.x.8
	Added VID/PIDs for ETS-Lindgren.

Version 4.x.7
	Added VID/PID for Sekonic and DASCOM.
	Minor fix to postflight script for 64 bit 10.8 and below OS's.

Version 4.x.6
	Added VID/PIDs for Vorze and Cadex Electronics.

Version 4.x.5
	Added VID/PIDs for California Eastern Labs and Micro Computer Control Corp.

Version 4.x.4
	Added VID/PIDs for Zonge International, AES GmbH, SPORTident GmbH

Version 4.x.3
	Added VID/PID for Aruba Networks, Inc.

Version 4.x.2
	Added VID/PID for ARKRAY, Inc.

Version 4.x.1
	Added VID/PIDs for BodyCap, RTKWARE, and West Mountain Radio
	Added uninstaller script to DMG
	Installer now runs uninstaller script before executing install - removes older versions using previous naming scheme
	Dropping support for OS X 10.4.  If you require OS X 10.4 support, please install version 3.1 of the VCP driver

Version 4.x.0
	Added OSX 10.9 and 10.10 driver support with signed kernel extension
	Updated version numbering - 2nd digit represents target OS versions
		4.7 - OSX 10.7 and older, 32 bit
		4.8 - OSX 10.8 and older, 64 bit
		4.10 - OSX 10.9 and 10.10, 64 bit, signed kext
	Updated version numbering - 3rd digit represents VID/PID updates.  Customers not needing the new VID/PID do not need to update drivers for 3rd digit changes.
	Installer will now only install the proper matching kernel extension instead of both the 32 bit and 64 bit versions.

Version 3.1
	Added support for CP2108

Version 3.0
	Corrected issue where transmission would stop when a 0 length packet was sent
	incorrectly on aligned packet boundaries

Version 2.9
	Corrected issue with Baud Rates not being set properly if they were greater 
	than 230400 on PPC or Intel platforms
	Corrected an issue where a device might get stuck when coming out of sleep mode
	Corrected an issue on PPC where Baud Rates were not getting set properly
	Added enhanced support for sleep, now reads state on sleep and writes state on
	wake to provide smoother and more stable state transitions

Version 2.7
	Corrected issue with initial Stop Bits value
	Corrected issue which seen which switching between 32 and 64 bit mode and trying
	to use the driver in each mode
	Added in a clear stall to be more complete in invalid control transfers

Version 2.6
	Corrected all known Kernel Panics for 10.4/5/6 for surprise removal and data
	transmission
	Corrected an issue with data drop while using XON/XOFF flow control
	Corrected RTS/DTR toggling sync issue
	
Version 2.2
	Corrected Kernel Panic in Snow Leopard which would randomly occur after
	transmission
	Modified DTR pin to toggle on open and close instead of on insertion
	Modified driver to load without showing the Network Connection Dialog
	Modified driver to allow toggling of RTS and DTR pins
	Added 64 bit support for Snow Leopard
	
Version 2.1
	Corrected device strings that were changed in the 2.0 release back to the
	format used in pre-2.0 drivers

Version 2.0
	Driver architecture updated.

Version 1.06
	Corrected a bug which causes a Kernel Panic with a Baud Rate of 0, yileding
	a Divide-By-Zero error

Version 1.04
	Updated to support newer versions of Mac OSX
	

Version 1.02
	Updated to support the Intel platform through a universal binary that
	also supports PowerPC.

Version 1.00
	Initial Release


