Error importing/installing proprietary plugins - Eclipse - eclipse

Question

I have been trying for two days now to import some (proprietary) plugins through "Install New Software".
I also tried to install the plugin on Windows (managed to do so) and on Mac OS (failed with the below error) and now I'm trying to import all the plugins from the Windows Eclipse installation to Mac OS.
Some details on my environment :
Required Eclipse version 3.7 (I can't make the specific plugin run on anything higher than this)
Windows 7 / Mac OS Yosemite
What I tried and failed with the below errors:
Install from .jar installer
import from .p2f (File->Installer->Export / Import)
import from existing eclipse installation
copy plugin folder contents from Windows to Mac OS
Any way to manually install the (proprietary) plugin dependency? I'd gladly do so to fix this.
An error occurred while collecting items to be installed
session context was:(profile=SDKProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Multiple problems occurred while downloading.
Problems downloading artifact: osgi.bundle,org.eclipse.draw2d,3.10.100.201605020204.
Error reading signed content:/var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile1000771104122913962.jar
An error occurred while processing the signatures for the file: /var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile1000771104122913962.jar
Problems downloading artifact: osgi.bundle,org.eclipse.draw2d,3.10.100.201605020204.
Error reading signed content:/var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile8525447578852796584.jar
An error occurred while processing the signatures for the file: /var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile8525447578852796584.jar
Multiple problems occurred while downloading.
Problems downloading artifact: osgi.bundle,org.eclipse.gef,3.11.0.201605020204.
Error reading signed content:/var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile2832543910186645793.jar
An error occurred while processing the signatures for the file: /var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile2832543910186645793.jar
Problems downloading artifact: osgi.bundle,org.eclipse.gef,3.11.0.201605020204.
Error reading signed content:/var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile3899147127673910466.jar
An error occurred while processing the signatures for the file: /var/folders/0w/j9d33fsd0dn1xncjsm6vypjm0000gn/T/signatureFile3899147127673910466.jar
Edit
Seems like these are the correct versions of dependencies, I found them online, but I'm stuck at importing them manually.
An error occurred while collecting items to be installed
session context was:(profile=SDKProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.common_core.feature,3.3.1.v201107190400-7B7DFO5F7RZHOeJ-SxQ1NJ
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.common_ui.feature,3.3.1.v201107190400-7C79FULEdhO_pfuh6nYekfK0TyR2OK
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.jsdt.feature,1.3.1.v201108102009-7F78FXRFBBoPbXRPcHfz-uy
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.server_core.feature,3.3.1.v20110729_1216-30FBc8s73553F5Ia2828
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.server_ui.feature,3.3.1.v20110714_1706-7B77FGPAtJceyEUOhPIXVJNjBF39
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.web_core.feature,3.3.1.v201107190400-7E7EFMWAJun8_t84-MOI-iP7cRb5srz
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.web_ui.feature,3.3.1.v201107072200-7O7IFhREMiB5vNoYqf01XHTvUndyz-yx-9kUyXXL
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.xml_core.feature,3.3.1.v201108102009-7C7OFeKF7RZHQNI3R-OuRb
No repository found containing: org.eclipse.update.feature,org.eclipse.wst.xml_ui.feature,3.3.1.v201108102009-7H7EFZ3DxumTlaI6nheRdHo2p1KaDIL1Uz-S3PL

Answer 1

The feature org.eclipse.wst.* belong to Web Tools, you should download version 3.3.x for Eclipse v3.7.x
Web Tools required EMF/XSD SDK v2.7.x and GEF SDK v3.7.x, so you have to install them too. Base on downloaded files, There are two solution for install them.
A) Steps for install Traditional Zip Files or All-In-One SDK:
Unpack downloaded file to a folder under $ECLIPSE_HOME/dropins
Restart Eclipse
You can unpack all zips to one folder or different folder. For example: unpack to folder webtools and gef, the folder structures should be:
$ECLIPSE_HOME/
dropins/
webtools/
eclipse/
features/
plugins/
gef/
eclipse/
features/
plugins/
B) Steps for install P2 repositories in zipped format files or All-In-One Update Site:
Unpack downloaded file to local disk. (artifacts.jar and content.jar can found in the root folder)
In Eclipse, select menu item Help > Install New Software... Click Add... button and Local... button to select the folder in previous steps.
Click Next button, accept the license agreement until the installation finished.
Note: The download link of EMF/XSD SDK v2.7.1 is invalid. If the (proprietary) plugins work on Eclipse v3.7.2, I suggest you install this version.