Native port upload issue with 1.6.1 update for Zero

I used the boards manager to update to SAMD version 1.6.1 and now I’m unable to upload via the native port. I get this message:

Sketch uses 26,840 bytes (10%) of program storage space. Maximum is 262,144 bytes.
Forcing reset using 1200bps open/close on port /dev/cu.usbmodemfd131
PORTS {/dev/cu.Bluetooth-Incoming-Port, /dev/cu.Bluetooth-Modem, /dev/cu.usbmodemfd131, /dev/tty.Bluetooth-Incoming-Port, /dev/tty.Bluetooth-Modem, /dev/tty.usbmodemfd131, } / {/dev/cu.Bluetooth-Incoming-Port, /dev/cu.Bluetooth-Modem, /dev/cu.usbmodemfd131, /dev/tty.Bluetooth-Incoming-Port, /dev/tty.Bluetooth-Modem, /dev/tty.usbmodemfd131, } => {}
PORTS {/dev/cu.Bluetooth-Incoming-Port, /dev/cu.Bluetooth-Modem, /dev/cu.usbmodemfd131, /dev/tty.Bluetooth-Incoming-Port, /dev/tty.Bluetooth-Modem, /dev/tty.usbmodemfd131, } / {/dev/cu.Bluetooth-Incoming-Port, /dev/cu.Bluetooth-Modem, /dev/cu.usbmodemfd131, /dev/tty.Bluetooth-Incoming-Port, /dev/tty.Bluetooth-Modem, /dev/tty.usbmodemfd131, } => {}
Uploading using selected port: /dev/cu.usbmodemfd131
{runtime.tools.bossac-1.5-arduino.path}/bossac -i -d --port=cu.usbmodemfd131 -U true -i -e -w -v /var/folders/mt/7rrh06nw8xj05b0052g526300000gn/T/build3951073248618894757.tmp/Bell202ZeroAPRS.cpp.bin -R 
java.io.IOException: Cannot run program "{runtime.tools.bossac-1.5-arduino.path}/bossac": error=2, No such file or directory
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
	at java.lang.Runtime.exec(Runtime.java:620)
	at java.lang.Runtime.exec(Runtime.java:485)
	at processing.app.helpers.ProcessUtils.exec(ProcessUtils.java:11)
	at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:115)
	at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:158)
	at processing.app.debug.Compiler.upload(Compiler.java:166)
	at processing.app.Sketch.upload(Sketch.java:1164)
	at processing.app.Sketch.exportApplet(Sketch.java:1138)
	at processing.app.Sketch.exportApplet(Sketch.java:1110)
	at processing.app.Editor$DefaultExportHandler.run(Editor.java:2431)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error=2, No such file or directory
	at java.lang.UNIXProcess.forkAndExec(Native Method)
	at java.lang.UNIXProcess.<init>(UNIXProcess.java:248)
	at java.lang.ProcessImpl.start(ProcessImpl.java:134)
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
	... 11 more

I am able to upload via the native port if I select the built-in Zero board.

Wayne