Did you just run into a download or a file on your computer that has a digital signature from Macroplant LLC? If so, please read on.
You will probably notice Macroplant LLC when clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screencap shows:

You can also view the Macroplant LLC certificate with the following procedure:
Here is a screencap of a file that has been signed by Macroplant LLC:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This implies that the file has been published by Macroplant LLC and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also examine the address for Macroplant LLC, such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the Macroplant LLC certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Macroplant LLC files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/54 | unins000.exe |
The detection percentage is based on that I've gathered 54 scan results for the Macroplant LLC files. 0 of these scan results came up with some sort of detection. If you like, you can review the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: