# \#installation

**URL:** https://community.cdata.com/tag/installation/212.md

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## ["The .NET 4.0 64-Bit official Teradata ADO Driver is not installed!" warning when using our ODBC Driver for Teradata](https://community.cdata.com/t/the-net-4-0-64-bit-official-teradata-ado-driver-is-not-installed-warning-when-using-our-odbc-driver-for-teradata/394)

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**Author:** [@Gejsi\_D](https://community.cdata.com/u/Gejsi_D)\
**Replies:** 0\
**Last updated:** [September 14, 2023, 6:03pm UTC](https://community.cdata.com/t/the-net-4-0-64-bit-official-teradata-ado-driver-is-not-installed-warning-when-using-our-odbc-driver-for-teradata/394 "2023-09-14T18:03:00Z")

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To connect using the CData ODBC Driver for Teradata, you also need to install the Teradata .NET Data Provider into the GAC. Note: You can refer to the following Microsoft documentation on how to install a library in GAC…

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## ["Error opening file for writing..." when installing CData Drivers](https://community.cdata.com/t/error-opening-file-for-writing-when-installing-cdata-drivers/380)

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**Author:** [@Gejsi\_D](https://community.cdata.com/u/Gejsi_D)\
**Replies:** 0\
**Last updated:** [September 6, 2023, 8:24pm UTC](https://community.cdata.com/t/error-opening-file-for-writing-when-installing-cdata-drivers/380 "2023-09-06T20:24:47Z")

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The ‘Error opening file for writing…’ usually indicates that you are trying to overwrite a file that is in use. You’ll need to close any other applications you have which is using the connector (such as ODBC Da…

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## [CData application cannot be opened in macOS environments](https://community.cdata.com/t/cdata-application-cannot-be-opened-in-macos-environments/293)

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**Author:** [@Silvio\_A](https://community.cdata.com/u/Silvio_A)\
**Replies:** 0\
**Last updated:** [July 26, 2023, 9:10pm UTC](https://community.cdata.com/t/cdata-application-cannot-be-opened-in-macos-environments/293 "2023-07-26T21:10:25Z")

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The ‘CData \<Edition\> Driver for \<Data Source\> \<Year\>.pkg can’t be opened because Apple cannot check it for malicious software.’ error is thrown by Apple, due to their Gatekeeper security feature, and typically indicates …