diff --git a/GitAppObjc-Mac/AppDelegate.m b/GitAppObjc-Mac/AppDelegate.m
index a5da8a1..aa27c97 100644
--- a/GitAppObjc-Mac/AppDelegate.m
+++ b/GitAppObjc-Mac/AppDelegate.m
@@ -8,6 +8,10 @@
 
 #import "AppDelegate.h"
 
+#import <ObjectiveGit/ObjectiveGit.h>
+#import <ObjectiveGit/git2.h>
+#import <ObjectiveGit/git2/types.h>
+
 @interface AppDelegate ()
 
 @end
@@ -15,7 +19,48 @@ @interface AppDelegate ()
 @implementation AppDelegate
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
-    // Insert code here to initialize your application
+
+    // Set up certificates
+
+    /*
+     let CACertificateFile_DigiCert = "DigiCert High Assurance EV Root CA.pem"
+     let certFilePath = NSBundle.mainBundle().bundlePath.stringByAppendingPathComponent(CACertificateFile_DigiCert)
+     LogVerbose("Loading certificate: \(certFilePath)")
+
+     let file = (certFilePath as NSString).UTF8String
+     let path: UnsafePointer<Int8> = nil
+
+     let returnValue = _git_libgit2_opts(GIT_OPT_SET_SSL_CERT_LOCATIONS, getVaList([file, path])) // as int, Int8? CInt?
+     if (returnValue != 0) {
+     LogError("Error setting SSL certificate location")
+     }
+    */
+
+    NSString *CACertificateFile_DigiCert = @"DigiCert High Assurance EV Root CA.pem";
+    NSString *certFilePath = [[NSBundle mainBundle] pathForResource:[CACertificateFile_DigiCert stringByDeletingPathExtension] ofType:[CACertificateFile_DigiCert pathExtension]];
+    NSLog(@"certFilePath: %@", certFilePath);
+
+    int returnValue = git_libgit2_opts(GIT_OPT_SET_SSL_CERT_LOCATIONS, [certFilePath UTF8String], NULL);
+    if (returnValue != GITERR_NONE) {
+        NSLog(@"git_libgit2_opts returned an error %ld", (long)returnValue);
+    }
+
+    NSURL *cloneURL = [NSURL URLWithString:@"https://github.com/phatblat/GitApp.git"];
+    NSURL *workDirURL = [NSURL URLWithString:@"/tmp/GitApp"];
+    NSDictionary *options = @{};
+    NSError *error = nil;
+    GTRepository *repo = [GTRepository cloneFromURL:cloneURL toWorkingDirectory:workDirURL options:options error:&error
+      transferProgressBlock:^(const git_transfer_progress * _Nonnull progress, BOOL * _Nonnull stop) {
+        NSLog(@"transfer progress %ld", (long)progress->received_objects);
+    } checkoutProgressBlock:^(NSString * _Nonnull path, NSUInteger completedSteps, NSUInteger totalSteps) {
+        NSLog(@"clone progress %ld/%ld", (long)completedSteps, (long)totalSteps);
+    }];
+
+    if (!repo) {
+        NSLog(@"Error cloning repo %@", error);
+        return;
+    }
+    NSLog(@"Cloned repo: %@", repo.description);
 }
 
 - (void)applicationWillTerminate:(NSNotification *)aNotification {