I'm 51 and currently out of work (in the UK). I've worked in IT, sort of, before. I have 14 or so years of experience using Linux on the Desktop at home, plus as many helping friends and family with Windows PC's. I switched to Macs for a year, a few years back, went back to Linux for a while and then back to Macs a year or so ago. I've tinkered - swapping drives and RAM on older machines, upgrading/installing the OS, fixing the odd Mac for friends and family, so am not afraid of going under the hood. My questions are - I've just bought the OSX Support Essentials book with the intention of working my way through it and then taking the exam to get the CAPT qualification. It's very expensive to do this, so a first question might be 'is it a waste of time?' (given my age and the fact it was nigh on 10 years ago that I worked in IT). A second question is, I note that OSX Server is surprisingly cheap on the App Store - is it worth getting that and putting it on my spare iMac and learning that too? Instinct tells me that a home learned working knowledge, without the actual qualification, though useful, is likely be of no consequence when applying for work. I notice that the current qualification is for El Capitan, yet Sierra is being pushed now - would the El Capitan qualification be likely to become obsolete in a few months time (presumably when the books and exams have caught up with the latest release. This applies also to the Server qualification and books - all currently on Server 5.0, whereas the App Store is on 5.2). I realise no one has a looking glass. It's more of 'general feel for the industry' type question. Apologies if I've posted this to the wrong forum. This one seemed most appropriate.