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These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs ideally about 1/4 of empty space to maintain performance. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future (if using a non-Apple SSD).

These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs ideally about 1/4 of empty space to maintain performance. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future (if using a non-Apple SSD).

These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs about 1/3 of empty space to maintain speed. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future (if using a non-Apple SSD).

These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs ideally about 1/4 of empty space to maintain performance. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future (if using a non-Apple SSD).

These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs about 1/3 of empty space to maintain speed. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future.

These are the steps I would generally recommend:

1. Backup
2. Run Disk Utility from the Recovery Partition (press cmd+R at startup)
3. Run Onyx
4. Reinstall OS X (e.g. from recovery partition)
5. Clean reinstall OS X (i.e. wipe partition, install OS X, restore backup)

After each step, see if you get better results.

In your case I think you have a very decent machine and it shouldn't really be much slower than current MacBooks, especially since you already have a SSD.

However, your SSD is too full. A SSD needs about 1/3 of empty space to maintain speed. Also OSX is known to slow down on full disks. In your case step 5 may be necessary, because maybe the SSD couldn't effectively do garbage collection or TRIM. By overwriting the disk empty blocks get reinitialised. You can try activating TRIM in the future (if using a non-Apple SSD).