diff --git a/.travis.yml b/.travis.yml
index 10e3edd..e4ef812 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,11 +37,10 @@ addons:
     packages:
       - libbluetooth-dev
       - libusb-1.0-0-dev
-
-install:
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then
-        brew install hidapi libusb;
-    fi
+  homebrew:
+    packages:
+      - hidapi
+      - libusb
 
 script:
   - case $CC in
diff --git a/src/array.c b/src/array.c
index 5574083..de15bc1 100644
--- a/src/array.c
+++ b/src/array.c
@@ -167,7 +167,7 @@ array_uint_be (const unsigned char data[], unsigned int n)
 	unsigned int value = 0;
 	for (unsigned int i = 0; i < n; ++i) {
 		shift -= 8;
-		value |= data[i] << shift;
+		value |= (unsigned int) data[i] << shift;
 	}
 	return value;
 }
@@ -178,7 +178,7 @@ array_uint_le (const unsigned char data[], unsigned int n)
 	unsigned int shift = 0;
 	unsigned int value = 0;
 	for (unsigned int i = 0; i < n; ++i) {
-		value |= data[i] << shift;
+		value |= (unsigned int) data[i] << shift;
 		shift += 8;
 	}
 	return value;
@@ -187,21 +187,30 @@ array_uint_le (const unsigned char data[], unsigned int n)
 unsigned int
 array_uint32_be (const unsigned char data[])
 {
-	return (data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3];
+	return ((unsigned int) data[0] << 24) |
+	       ((unsigned int) data[1] << 16) |
+	       ((unsigned int) data[2] <<  8) |
+	       ((unsigned int) data[3] <<  0);
 }
 
 
 unsigned int
 array_uint32_le (const unsigned char data[])
 {
-	return data[0] + (data[1] << 8) + (data[2] << 16) + (data[3] << 24);
+	return ((unsigned int) data[0] <<  0) |
+	       ((unsigned int) data[1] <<  8) |
+	       ((unsigned int) data[2] << 16) |
+	       ((unsigned int) data[3] << 24);
 }
 
 
 unsigned int
 array_uint32_word_be (const unsigned char data[])
 {
-	return data[1] + (data[0] << 8) + (data[3] << 16) + (data[2] << 24);
+	return ((unsigned int) data[0] <<  8) |
+	       ((unsigned int) data[1] <<  0) |
+	       ((unsigned int) data[2] << 24) |
+	       ((unsigned int) data[3] << 16);
 }
 
 
@@ -218,7 +227,9 @@ array_uint32_le_set (unsigned char data[], const unsigned int input)
 unsigned int
 array_uint24_be (const unsigned char data[])
 {
-	return (data[0] << 16) + (data[1] << 8) + data[2];
+	return ((unsigned int) data[0] << 16) |
+	       ((unsigned int) data[1] <<  8) |
+	       ((unsigned int) data[2] <<  0);
 }
 
 
@@ -234,20 +245,24 @@ array_uint24_be_set (unsigned char data[], const unsigned int input)
 unsigned int
 array_uint24_le (const unsigned char data[])
 {
-	return data[0] + (data[1] << 8) + (data[2] << 16);
+	return ((unsigned int) data[0] <<  0) |
+	       ((unsigned int) data[1] <<  8) |
+	       ((unsigned int) data[2] << 16);
 }
 
 unsigned short
 array_uint16_be (const unsigned char data[])
 {
-	return (data[0] << 8) + data[1];
+	return ((unsigned int) data[0] <<  8) |
+	       ((unsigned int) data[1] <<  0);
 }
 
 
 unsigned short
 array_uint16_le (const unsigned char data[])
 {
-	return data[0] + (data[1] << 8);
+	return ((unsigned int) data[0] <<  0) |
+	       ((unsigned int) data[1] <<  8);
 }
 
 unsigned char
diff --git a/src/atomics_cobalt.c b/src/atomics_cobalt.c
index 21d5896..e907b77 100644
--- a/src/atomics_cobalt.c
+++ b/src/atomics_cobalt.c
@@ -43,13 +43,17 @@
 
 #define EXITCODE(rc) (rc == LIBUSB_ERROR_TIMEOUT ? DC_STATUS_TIMEOUT : DC_STATUS_IO)
 
+#define COBALT1 0
+#define COBALT2 2
+
 #define VID 0x0471
 #define PID 0x0888
 #define TIMEOUT 2000
 
 #define FP_OFFSET 20
 
-#define SZ_MEMORY (29 * 64 * 1024)
+#define SZ_MEMORY1 (29 * 64 * 1024) // Cobalt 1
+#define SZ_MEMORY2 (41 * 64 * 1024) // Cobalt 2
 #define SZ_VERSION 14
 
 typedef struct atomics_cobalt_device_t {
@@ -350,9 +354,12 @@ atomics_cobalt_device_foreach (dc_device_t *abstract, dc_dive_callback_t callbac
 {
 	atomics_cobalt_device_t *device = (atomics_cobalt_device_t *) abstract;
 
+	// Get the model number.
+	unsigned int model = array_uint16_le (device->version + 12);
+
 	// Enable progress notifications.
 	dc_event_progress_t progress = EVENT_PROGRESS_INITIALIZER;
-	progress.maximum = SZ_MEMORY + 2;
+	progress.maximum = (model == COBALT2 ? SZ_MEMORY2 : SZ_MEMORY1) + 2;
 	device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
 
 	// Emit a vendor event.
diff --git a/src/context.c b/src/context.c
index 7b6b969..1e77d83 100644
--- a/src/context.c
+++ b/src/context.c
@@ -41,7 +41,7 @@ struct dc_context_t {
 	dc_logfunc_t logfunc;
 	void *userdata;
 #ifdef ENABLE_LOGGING
-	char msg[8192 + 32];
+	char msg[16384 + 32];
 	dc_timer_t *timer;
 #endif
 };