Cannot upload sketch from Macbook pro

I am using a Redboard Turbo with the Arduino IDE(1.8.16) on both an iMac and Macbook Pro. Both computers are running Catalia (OSX 10.15.7). Everything works fine on the iMac. However, I get the following error when trying to upload from the MacBook Pro:

Arduino: 1.8.16 (Mac OS X), Board: “SparkFun RedBoard Turbo”

Sketch uses 13072 bytes (4%) of program storage space. Maximum is 262144 bytes.

java.io.IOException: Cannot run program “{runtime.tools.bossac-1.7.0-arduino3.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:129)

at cc.arduino.packages.uploaders.SerialUploader.runCommand(SerialUploader.java:383)

at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:197)

at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)

at processing.app.SketchController.upload(SketchController.java:732)

at processing.app.SketchController.exportApplet(SketchController.java:703)

at processing.app.Editor$UploadHandler.run(Editor.java:2061)

at java.lang.Thread.run(Thread.java:748)

Caused by: java.io.IOException: error=2, No such file or directory

at java.lang.UNIXProcess.forkAndExec(Native Method)

at java.lang.UNIXProcess.(UNIXProcess.java:247)

at java.lang.ProcessImpl.start(ProcessImpl.java:134)

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)

… 11 more

I have uninstalled and reinstalled the Arduino IDE several times as well as uninstalled and reinstalled the Redboard Turbo board with the board manager several times.

I compared the Arduino15 folders from both machines and the files look the same including the bossac file.

Any ideas what I should try next?

Thanks,

Hmmm…maybe update try updating bossac from 1.7 to 1.9 and see if that helps? https://github.com/shumatech/BOSSA/releases

Thanks for your suggestion. I tried that with no change. So I uninstalled everything again. This time I deleted the Arduino15 folder. After reinstalling everything, it now works properly.